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VulnerabilityPublished Updated

CVE-2026-28368: Red Hat JBoss Enterprise Application Platform 8.1.6 jboss-eap · HTTP Request/Response Smuggling

Affects Red Hat JBoss Enterprise Application Platform 8.1.6 jboss-eapSource CVE Database V5

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Not known to be exploited · CVSS 8.7 High.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
8.7High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.7% chance of exploitation in 30 days – higher than 54% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Mar 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 30 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hatredhat/jboss-eappkg:rpm/redhat/jboss-eapOther threatsAffected
  • >=8.1.0 <=8.1.5
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 is available in Red Hat JBoss Enterprise Application Platform version 8.1.6 that fixes this vulnerability. Users should apply this official patch to remediate the issue. Before updating, ensure all prior errata are applied and back up existing installations and configurations. No alternative mitigations are specified by the vendor advisory.

Description

A flaw was found in Undertow. This vulnerability allows a remote attacker to construct specially crafted requests where header names are parsed differently by Undertow compared to upstream proxies. This discrepancy in header interpretation can be exploited to launch request smuggling attacks, potentially bypassing security controls and accessing unauthorized resources.

References

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