Red Hat Security Advisory: OpenJDK 17.0.18 Security Update for Windows Builds
Affects Red Hat OpenJDK 17.0.18Source GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 4.8 Medium.
Data as of 30 Oct 2026, 06:15 UTC
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 20 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| Oracle CorporationOracle Java SE | Affected
| Fixed in– |
| Oracle CorporationOracle GraalVM for JDK | Affected
| Fixed in– |
| Oracle CorporationOracle GraalVM Enterprise Edition | Affected
| Fixed in– |
Mavencom.oracle/java-sepkg:maven/com.oracle/java-seOther threats | Affected
| 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 17.0.18 for Windows as a security update that includes fixes for the identified vulnerabilities. Users should apply this update to replace version 17.0.17 after ensuring all previously released relevant errata have been applied. Detailed instructions for applying the update are available in the Red Hat knowledge base. No additional mitigation steps are indicated beyond applying the official update.
Description
Red Hat has released an important security update for its OpenJDK 17 build on Windows, version 17.0.18, replacing version 17.0.17. This update addresses multiple security vulnerabilities related to JMX connections, URI handling, HTTP server request processing, and certificate checking. The update includes security and bug fixes as well as enhancements. Users are advised to apply this update after ensuring all prior relevant errata have been applied.
References
- access.redhat.com/errata/RHSA-2026:0898 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- docs.redhat.com/en/documentation/red_hat_build_of_openjdk/17/html/release_notes_for_red_hat_build_of_openjdk_17.0.18/index (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_0898.json (opens in a new tab)