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CVE-2026-83374VulnerabilityPublished

Red Hat Security Advisory: java-21-openjdk security update for RHEL 10

Affects Red Hat java-21-openjdkSource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-83374· Medium 5.9

Not known to be exploited · CVSS 5.9 Medium.

Data as of 30 Oct 2026, 02:59 UTC

CVSS 3.1 base score
5.9Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (oracle)CVSS 3.15.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 20 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Oracle CorporationOracle Java SEAffected
  • 8u503 – 27
7 affected builds
Fixed in–
Oracle CorporationOracle GraalVM for JDKAffected
  • =17.0.20.1
  • =21.0.12.1
Fixed in–
Oracle CorporationOracle GraalVM Enterprise EditionAffected
  • =21.3.19.1.1
Fixed in–
Mavencom.oracle.java/java-sepkg:maven/com.oracle.java/java-seOther threatsAffected
  • 8u503 – 27
8 affected builds
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released an official security update for the java-21-openjdk packages in Red Hat Enterprise Linux 10 and its variants. Users should apply this update promptly to remediate the listed vulnerabilities. Additionally, updating the ca-certificates package is recommended to address related certificate store issues. Before applying this update, ensure all previously released errata relevant to your system are applied. Refer to Red Hat's official update instructions at https://access.redhat.com/articles/11258 for detailed guidance.

Description

Red Hat has issued a security update for the java-21-openjdk packages included in Red Hat Enterprise Linux 10. This update addresses multiple security vulnerabilities in the OpenJDK 21 Java Runtime Environment and Software Development Kit, including issues related to PKCS5 padding, TLS certificate handling, LDAP logins, SASL authentication, HTTP client and server handling, XML processing, and various other components. The update is rated as having an Important security impact. Users should apply this update to mitigate these vulnerabilities.

References

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