CVE-2026-14180 — Undertow-core: undertow:http request smuggling via oversized chunk-size bit overlap

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

1. Identify exposed assets running the affected vendor/product/version combinations (Red Hat Jboss Enterprise Application Platform Expansion Pack, Red Hat Red Hat build of Apache Camel - HawtIO 4, Red Hat Red Hat build of Apache Camel for Spring Boot 4…).
2. The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
3. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
4. Search available logs for exploit probes matching the vulnerability class (injection), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-444 · HTTP Request Smuggling

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

• Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
• Look for parameters with command/query metacharacters and unexpected child processes of the service.

Timeline

What happened to this CVE, newest first.

• 2026
• Affected products added · red hat/red hat jboss enterprise application platform 8.1 for rhel 10, red hat/red hat jboss enterprise application plat
  Oct 16, 2026 · CVE Program (cve.org) e CISA ADP
• SSVC assessment updated
  Oct 16, 2026 · CVE Program (cve.org) e CISA ADP
• Record published
  Oct 15, 2026
• CVSS changed · 5.3
  Oct 15, 2026 · NIST National Vulnerability Database
• Source status changed · → Awaiting Analysis
  Oct 15, 2026 · NIST National Vulnerability Database
• Record created in this database
  Oct 15, 2026 · NIST National Vulnerability Database
• CVE published
  Aug 11, 2026 · redhat

Source activity

Repeated readings are counted rather than listed.

• 1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

6 on the record

• bugzilla.redhat.com/show_bug.cgi
  issue-tracking, x_refsource_REDHAT, NIST National Vulnerability Database
• access.redhat.com/errata/RHSA-2026:70230
  vendor-advisory, x_refsource_REDHAT, NIST National Vulnerability Database
• access.redhat.com/errata/RHSA-2026:70277
  vendor-advisory, x_refsource_REDHAT, NIST National Vulnerability Database
• access.redhat.com/security/cve/CVE-2026-14180
  vdb-entry, x_refsource_REDHAT, NIST National Vulnerability Database
• access.redhat.com/errata/RHSA-2026:70228
  vendor-advisory, x_refsource_REDHAT, NIST National Vulnerability Database
• access.redhat.com/errata/RHSA-2026:70229
  vendor-advisory, x_refsource_REDHAT, NIST National Vulnerability Database

Elsewhere on this site

Related CVEs (same products)

• High CVE-2026-84823 Org.wildfly.core: wildfly: path traversal in take-snapshot discloses the server configuration to the monitor role 4h
• High CVE-2026-85634 Wildfly-core: wildfly-core: deployer rbac role privilege escalation via path traversal in deployment name 11h
• Medium CVE-2026-110924 Openssh: openssh: gssapi delegated credentials can be stored after a failed authentication 14h
• Medium CVE-2026-110927 Openssh: openssh: a compressed payload can expand past the maximum packet size 14h
• Medium CVE-2026-110926 Openssh: openssh: shared lz77 compression dictionary leaks plaintext across channels 22h
• Medium CVE-2026-110923 Openssh: openssh: sftp can write outside the destination directory from a server-supplied path 22h

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

• No fixed version, patch or mitigation documented.
• No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
• No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
• No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-14180 is "Undertow-core: undertow:http request smuggling via oversized chunk-size bit overlap", rated Medium. It affects Jboss Enterprise Application Platform Expansion Pack (Red Hat); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 5.3 describes technical severity. EPSS 1.03% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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