Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 8.1.3 security update
Affects Red HatSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 7.5 High : upgrade Red Hat undertow to 8.1.3 soon.
Data as of 5 Nov 2026, 17:18 UTC
Thin evidence
One scorer or none| CISA-ADP | CVSS 3.1 | 7.5 |
|---|
- Patch
- Available – fixed in 8.1.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 3 Dec 2025
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 5 Nov 2026.
What to do
Upgrade org.wildfly.extension/undertow to 8.1.3.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Mavenorg.wildfly.extension/undertowpkg:maven/org.wildfly.extension/undertowOther 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
A security update to Red Hat JBoss Enterprise Application Platform 8.1.3 is available that addresses these vulnerabilities. Users should apply this update after ensuring all previously released errata have been applied and backing up their installations. The vendor advisory provides detailed instructions for applying the update. No additional mitigations are specified beyond applying the official patch.
Description
Red Hat JBoss Enterprise Application Platform 8.1.3 includes important security fixes addressing vulnerabilities in the Undertow HTTP server component. These fixes resolve issues such as failure to reject malformed Host headers leading to potential cache poisoning and SSRF (CVE-2025-12543), an OutOfMemory error when parsing form data with application/x-www-form-urlencoded encoding (CVE-2024-3884), and a HTTP/2 DDoS vulnerability (CVE-2025-9784). The update replaces version 8.1.2 and includes bug fixes and enhancements.
References
- access.redhat.com/errata/RHSA-2026:0383 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- docs.redhat.com/en/documentation/red_hat_jboss_enterprise_application_platform/8.1 (opens in a new tab)
- docs.redhat.com/en/documentation/red_hat_jboss_enterprise_application_platform/8.1/html/release_notes_for_red_hat_jboss_enterprise_application_platform_8.1/index (opens in a new tab)
- docs.redhat.com/en/documentation/red_hat_jboss_enterprise_application_platform/8.1/html/red_hat_jboss_enterprise_application_platform_installation_methods/index (opens in a new tab)
- access.redhat.com/articles/7134190 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2275287 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2392306 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2408784 (opens in a new tab)
- issues.redhat.com/browse/JBEAP-30596 (opens in a new tab)
- issues.redhat.com/browse/JBEAP-31250 (opens in a new tab)
- issues.redhat.com/browse/JBEAP-31326 (opens in a new tab)
- issues.redhat.com/browse/JBEAP-31344 (opens in a new tab)
- issues.redhat.com/browse/JBEAP-31345 (opens in a new tab)
- issues.redhat.com/browse/JBEAP-31373 (opens in a new tab)
- issues.redhat.com/browse/JBEAP-31380 (opens in a new tab)
- issues.redhat.com/browse/JBEAP-31389 (opens in a new tab)
- issues.redhat.com/browse/JBEAP-31396 (opens in a new tab)
- issues.redhat.com/browse/JBEAP-31414 (opens in a new tab)
- issues.redhat.com/browse/JBEAP-31421 (opens in a new tab)