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CVE-2026-83374VulnerabilityPublished

Red Hat Security Advisory: java-17-openjdk security update for RHEL 9

Affects Red Hat java-17-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 1 Nov 2026, 00:21 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 31 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 update for the java-17-openjdk packages that addresses these vulnerabilities. Users should apply this update promptly after ensuring all previously released errata relevant to their system have been applied. Additionally, updating the ca-certificates package will resolve related certificate store issues. Detailed instructions for applying the update are available in the Red Hat advisory. No further mitigation actions are indicated beyond applying the official update.

Description

Red Hat has issued a security advisory for the java-17-openjdk packages in Red Hat Enterprise Linux 9, addressing multiple vulnerabilities across various components of the OpenJDK 17 runtime and development kit. The update includes enhancements and fixes for issues related to PKCS5 padding, TLS certificate handling, LDAP logins, SASL authentication, HTTP client and server handling, XML processing, image and font rendering, Kerberos validation, and more. These fixes collectively address a broad range of security concerns in the Java environment provided by OpenJDK 17.

References

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