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CVE-2026-83378

MEDIUM 4.8

Published 2026-10-20 · Last modified 2026-10-20

Vulnerability in Oracle Java SE (component: Compiler). Supported versions that are affected are Oracle Java SE: 21.0.12.1, 25.0.4.1 and 27. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Java SE accessible data as well as unauthorized read access to a subset of Oracle Java SE accessible data. Note: This vulnerability can only be exploited by supplying data to APIs in the specified Component without using Untrusted Java Web Start applications or Untrusted Java applets, such as through a web service. CVSS 3.1 Base Score 4.8 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N).

NO EXPLOITATION SIGNALS

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

Exploitation likelihood

0.2%chance of exploitation in 30 days · 13th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

4.8CVSS 3.1 · MEDIUM

  • ConfidentialityLow
  • IntegrityLow
  • AvailabilityNone

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 Oracle Corporation

Products Oracle Java Se

Weakness (CWE)

Not classified.

CVSS vector

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

References and research data (JSON)

Vendor product assessments

Showing 32 of 300 vendor product statements; 268 omitted. Read the full vendor advisory.

  • java-21-openjdk-portable.src as a component of Red Hat build of OpenJDK 21 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/java-21-openjdk-portable?arch=src

    • none available: Affected
    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-21-openjdk-demo-fastdebug as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/java-21-openjdk-demo-fastdebug

    • none available: Affected
    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-21-openjdk-jmods-fastdebug as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/java-21-openjdk-jmods-fastdebug

    • none available: Affected
    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-25-openjdk-crypto-adapter-fastdebug as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/java-25-openjdk-crypto-adapter-fastdebug

    • none available: Affected
    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-25-openjdk-headless-slowdebug as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/java-25-openjdk-headless-slowdebug

    • none available: Affected
    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-25-openjdk-static-libs-slowdebug as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/java-25-openjdk-static-libs-slowdebug

    • none available: Affected
    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-1.7.0-openjdk-src as a component of Red Hat Enterprise Linux 6 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/java-1.7.0-openjdk-src

    • no fix planned: Out of support scope
    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-1.8.0-openjdk-src as a component of Red Hat Enterprise Linux 6 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/java-1.8.0-openjdk-src

    • no fix planned: Out of support scope
    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-1.7.0-openjdk-devel as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/java-1.7.0-openjdk-devel

    • no fix planned: Out of support scope
    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-21-openjdk-fastdebug as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/java-21-openjdk-fastdebug

    • none available: Affected
    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-21-openjdk-src-slowdebug as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/java-21-openjdk-src-slowdebug

    • none available: Affected
    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-21-openjdk-fastdebug as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/java-21-openjdk-fastdebug

    • none available: Affected
    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-21-openjdk-src-fastdebug as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/java-21-openjdk-src-fastdebug

    • none available: Affected
    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-25-openjdk-demo-slowdebug as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/java-25-openjdk-demo-slowdebug

    • none available: Affected
    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-25-openjdk-jmods-slowdebug as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/java-25-openjdk-jmods-slowdebug

    • none available: Affected
    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-25-openjdk.src as a component of Red Hat Hardened Images · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/java-25-openjdk?arch=src

    • none available: Affected
    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-1.8.0-openjdk-portable.src as a component of Red Hat build of OpenJDK 1.8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/java-1.8.0-openjdk-portable?arch=src

    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-1.8.0-openjdk-accessibility as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/java-1.8.0-openjdk-accessibility

    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-1.8.0-openjdk-headless-debug as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/java-1.8.0-openjdk-headless-debug

    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-1.8.0-ibm as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/java-1.8.0-ibm

    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-1.8.0-openjdk as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/java-1.8.0-openjdk

    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-1.8.0-openjdk-devel-fastdebug as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/java-1.8.0-openjdk-devel-fastdebug

    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-1.8.0-openjdk-slowdebug as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/java-1.8.0-openjdk-slowdebug

    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-17-openjdk-demo-slowdebug as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/java-17-openjdk-demo-slowdebug

    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-17-openjdk-javadoc as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/java-17-openjdk-javadoc

    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-17-openjdk-src-slowdebug as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/java-17-openjdk-src-slowdebug

    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-1.8.0-openjdk-demo-slowdebug as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/java-1.8.0-openjdk-demo-slowdebug

    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-1.8.0-openjdk-javadoc as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/java-1.8.0-openjdk-javadoc

    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-17-openjdk-demo as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/java-17-openjdk-demo

    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-17-openjdk-headless-fastdebug as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/java-17-openjdk-headless-fastdebug

    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-17-openjdk-src as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/java-17-openjdk-src

    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00
  • java-17-openjdk-portable.src as a component of Red Hat Hardened Images · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/java-17-openjdk-portable?arch=src

    Red Hat · CVE-2026-83378 · Updated 2026-10-22T22:00:20+00:00

All CVSS metrics

  • MEDIUM 4.8 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
  • MEDIUM 4.8 v3.1 · NVD Primary
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

References

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS