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CVE-2026-106449

LOW 3.7

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

yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.4, net.jpountz.lz4.LZ4BlockInputStream configured with stopOnEmptyBlock set to false handles each well-formed empty LZ4Block by recursively calling refill(), allowing a long sequence of empty blocks in an attacker-controlled compressed stream to exhaust the decoding thread's stack and throw StackOverflowError. The default stopOnEmptyBlock setting is true and is not affected, and the issue does not cause memory corruption. This issue is fixed in version 1.11.4.

NO EXPLOITATION SIGNALS

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

Exploitation likelihood

0.4%chance of exploitation in 30 days · 36th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

3.7CVSS 3.1 · LOW

  • 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: Needs a race window or specific setup

✓ 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-674: : Uncontrolled Recursion

CVSS vector

CVSS:3.1/AV:N/AC:H/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): 1.11.4
    11 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, 1.11.2, 1.11.3, 1.8.1, 1.9.0

    Additional upstream package constraints
    {
  "database": {
    "last_known_affected_version_range": "<= 1.11.3",
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-343h-94h5-c4wr/GHSA-343h-94h5-c4wr.json"
  }
}
    GitHub Advisory Database · GHSA-343h-94h5-c4wr · Updated 2026-10-07T20:45:07.306709237Z
  • 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-343h-94h5-c4wr/GHSA-343h-94h5-c4wr.json"
  }
}
    GitHub Advisory Database · GHSA-343h-94h5-c4wr · Updated 2026-10-07T20:45:07.306709237Z

Vendor product assessments

  • 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/org.lz4/[email protected]

    • 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-2026-106449 · Updated 2026-10-07T06:12:06+00:00
  • lz4-java as a component of Red Hat build of Debezium 3 · known affected

    Vendor assessment for this product only.

    pkg:maven/org.lz4/[email protected]

    • 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-2026-106449 · Updated 2026-10-07T06:12:06+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-2026-106449 · Updated 2026-10-07T06:12:06+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-2026-106449 · Updated 2026-10-07T06:12:06+00:00
  • lz4-java as a component of Red Hat Fuse 7 · known affected

    Vendor assessment for this product only.

    pkg:maven/org.lz4/[email protected]

    • 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-2026-106449 · Updated 2026-10-07T06:12:06+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/org.lz4/[email protected]

    • 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-2026-106449 · Updated 2026-10-07T06:12:06+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/org.lz4/[email protected]

    • 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-2026-106449 · Updated 2026-10-07T06:12:06+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-2026-106449 · Updated 2026-10-07T06:12:06+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-2026-106449 · Updated 2026-10-07T06:12:06+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-2026-106449 · Updated 2026-10-07T06:12:06+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@sha256:cdd7d9f982c1f8a94dd4aad43e705274aae1bf0942e0442e60c3973f9c198f23?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-2026-106449 · Updated 2026-10-07T06:12:06+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@sha256:ea69ab01a3aaeba9b4db8abbace9014a3044e0f0f13fb7aaaef93acf72f50248?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-2026-106449 · Updated 2026-10-07T06:12:06+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@sha256:b2a253f3dc063a8e1cee441640cce13fcf04918ce453be8f5d488301b1458a91?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-2026-106449 · Updated 2026-10-07T06:12:06+00:00

All CVSS metrics

  • LOW 3.7 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
  • LOW 3.7 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

References

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS