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CVE-2026-83374VulnerabilityPublished

Red Hat Security Advisory: OpenJDK 21.0.13 Security Update for Windows Builds

Affects Red Hat OpenJDK 21.0.13Source 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 29 Oct 2026, 17:23 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 OpenJDK 21.0.13 for Windows as a replacement for versions 21.0.12 and 21.0.12.1, which includes fixes for all listed vulnerabilities. Users should apply this update promptly to mitigate the security risks. Before applying, ensure all previously released errata relevant to your system are installed. No additional mitigation steps are specified or required beyond applying this official update.

Description

Red Hat has released a security update for its OpenJDK 21 build for Windows (version 21.0.13) addressing multiple security vulnerabilities. This update replaces previous versions 21.0.12 and 21.0.12.1 and includes numerous enhancements and fixes related to cryptographic padding, TLS certificate handling, LDAP logins, HTTP client and server behavior, XML processing, Kerberos validation, image handling, and distrust of certain intermediate CA certificates. The update is rated critical by Red Hat Product Security.

References

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