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CVE-2026-106452

MEDIUM 5.3

Published 2026-10-06 · Last modified 2026-10-07

yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.2, net.jpountz.lz4.LZ4BlockInputStream refill() validates that the compressedLen field in a legacy LZ4Block header is nonnegative but allocates a compressed-input buffer of that attacker-controlled size before reading payload data, allowing a header-only stream to request a near-2 GiB allocation and exhaust the JVM heap. Canonical writers emit raw blocks when compression is not smaller than the original block, but vulnerable readers accept non-canonical oversized compressed blocks. This issue is fixed in version 1.11.2.

NO EXPLOITATION SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.5%chance of exploitation in 30 days · 39th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

5.3CVSS 3.1 · MEDIUM

  • ConfidentialityNone
  • IntegrityNone
  • AvailabilityLow

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ✓Privileges: No account or privileges required
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot:

Affected

Vendors Yawkat

Products Lz4 Java

Weakness (CWE)

  • CWE-789: : Memory Allocation with Excessive Size Value

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References and research data (JSON)

Packages and version ranges

Each advisory describes its own package and affected ranges. A boundary applies to that range; it is not a universal upgrade recommendation.

  • at.yawk.lz4:lz4-java Maven

    pkg:maven/at.yawk.lz4/lz4-java

    ECOSYSTEM range
    • All earlier versions (introduced 0)
    • Fixed boundary (excluded): 1.11.2
    9 explicitly listed affected versions

    1.10.0, 1.10.1, 1.10.2, 1.10.3, 1.10.4, 1.11.0, 1.11.1, 1.8.1, 1.9.0

    Additional upstream package constraints
    {
  "database": {
    "last_known_affected_version_range": "<= 1.11.1",
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-4v53-57pg-c464/GHSA-4v53-57pg-c464.json"
  }
}
    GitHub Advisory Database · GHSA-4v53-57pg-c464 · Updated 2026-10-07T16:30:04.845963758Z
  • org.lz4:lz4-java Maven

    pkg:maven/org.lz4/lz4-java

    ECOSYSTEM range
    • All earlier versions (introduced 0)
    • Last affected version (included): 1.8.1
    10 explicitly listed affected versions

    1.4, 1.4.0, 1.4.1, 1.5.0, 1.5.1, 1.6.0, 1.7.0, 1.7.1, 1.8.0, 1.8.1

    Additional upstream package constraints
    {
  "database": {
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-4v53-57pg-c464/GHSA-4v53-57pg-c464.json"
  }
}
    GitHub Advisory Database · GHSA-4v53-57pg-c464 · Updated 2026-10-07T16:30:04.845963758Z

Vendor product assessments

  • jenkins-2-plugins.src as a component of OpenShift Developer Tools and Services · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/jenkins-2-plugins?arch=src

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • ocp-tools-4/jenkins-rhel8 as a component of OpenShift Developer Tools and Services · known affected

    Vendor assessment for this product only.

    pkg:oci/jenkins-rhel8?repository_url=registry.redhat.io/ocp-tools-4/jenkins-rhel8

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • ocp-tools-4/jenkins-rhel9 as a component of OpenShift Developer Tools and Services · known affected

    Vendor assessment for this product only.

    pkg:oci/jenkins-rhel9?repository_url=registry.redhat.io/ocp-tools-4/jenkins-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • lz4-java as a component of Red Hat build of Apache Camel 4 for Quarkus 3 · known affected

    Vendor assessment for this product only.

    pkg:maven/at.yawk.lz4/lz4-java

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • liblz4-java.so as a component of Red Hat build of Apache Camel for Spring Boot 4 · known affected

    Vendor assessment for this product only.

    pkg:generic/liblz4-java.so

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • lz4-java as a component of Red Hat build of Apache Camel for Spring Boot 4 · known affected

    Vendor assessment for this product only.

    pkg:maven/at.yawk.lz4/lz4-java

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • lz4-java as a component of Red Hat build of Apicurio Registry 3 · known affected

    Vendor assessment for this product only.

    pkg:maven/at.yawk.lz4/lz4-java

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • lz4-java as a component of Red Hat build of Debezium 3 · known affected

    Vendor assessment for this product only.

    pkg:maven/at.yawk.lz4/lz4-java

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • lz4-java as a component of Red Hat build of Quarkus · known affected

    Vendor assessment for this product only.

    pkg:maven/at.yawk.lz4/lz4-java

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Affected
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • lz4-java as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:maven/at.yawk.lz4/lz4-java

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • lz4-java-javadoc as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/lz4-java-javadoc?rpmmod=jmc:rhel8

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • jmc as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/jmc

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • jmc.src as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/jmc?arch=src

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • lz4-java as a component of Red Hat Fuse 7 · known affected

    Vendor assessment for this product only.

    pkg:maven/at.yawk.lz4/lz4-java

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • no fix planned: Out of support scope
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • maven3.9.src as a component of Red Hat Hardened Images · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/maven3.9?arch=src

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • liblz4-java.so as a component of Red Hat JBoss Enterprise Application Platform 8 · known affected

    Vendor assessment for this product only.

    pkg:generic/liblz4-java.so

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • lz4-java as a component of Red Hat JBoss Enterprise Application Platform 8 · known affected

    Vendor assessment for this product only.

    pkg:maven/at.yawk.lz4/lz4-java

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • liblz4-java.so as a component of Red Hat JBoss Enterprise Application Platform Expansion Pack · known affected

    Vendor assessment for this product only.

    pkg:generic/liblz4-java.so

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • lz4-java as a component of Red Hat JBoss Enterprise Application Platform Expansion Pack · known affected

    Vendor assessment for this product only.

    pkg:maven/at.yawk.lz4/lz4-java

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • rhoai/odh-spark-operator-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-spark-operator-rhel9@sha256:837b9d7278cac5b40b2ddd989c05e2d07566bfd6ee4454a5a6add2779fdad887?repository_url=registry.redhat.io/rhoai/odh-spark-operator-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • rhoai/odh-th-torch-cpu-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-th-torch-cpu-py312-rhel9@sha256:d265d1398bceb2d971d725e27e81c8def1213b2f0dc265a37707b2f4270317ca?repository_url=registry.redhat.io/rhoai/odh-th-torch-cpu-py312-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • rhoai/odh-th-torch-cuda-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-th-torch-cuda-py312-rhel9@sha256:efd7b3607b699092c68359d20ef0d0043114191a097637667c0d2cf78fbea702?repository_url=registry.redhat.io/rhoai/odh-th-torch-cuda-py312-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • rhoai/odh-th06-cpu-torch210-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-th06-cpu-torch210-py312-rhel9?repository_url=registry.redhat.io/rhoai/odh-th06-cpu-torch210-py312-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • rhoai/odh-th06-cpu-torch291-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-th06-cpu-torch291-py312-rhel9?repository_url=registry.redhat.io/rhoai/odh-th06-cpu-torch291-py312-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • rhoai/odh-th06-cuda130-torch210-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-th06-cuda130-torch210-py312-rhel9?repository_url=registry.redhat.io/rhoai/odh-th06-cuda130-torch210-py312-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • rhoai/odh-th06-cuda130-torch291-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-th06-cuda130-torch291-py312-rhel9?repository_url=registry.redhat.io/rhoai/odh-th06-cuda130-torch291-py312-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00
  • rhoai/odh-th06-rocm64-torch291-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-th06-rocm64-torch291-py312-rhel9?repository_url=registry.redhat.io/rhoai/odh-th06-rocm64-torch291-py312-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-106452 · Updated 2026-10-13T10:44:52+00:00

All CVSS metrics

  • MEDIUM 5.3 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  • MEDIUM 5.3 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS