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VulnerabilityPublished Updated

CVE-2026-111816: Trafficserver · (Apache Traffic Server forwarded a malformed 302 response that should h ...)

Affects trafficserverSource GCVE Database

0
Authoritative record:CVE-2026-111816· Critical 9.3

Not known to be exploited · CVSS 9.3 Critical.

Data as of 27 Oct 2026, 07:56 UTC

CVSS 3.1 base score
9.3Critical
How severe the flaw is on the 0–10 CVSS scale.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 21 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: 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 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Ubuntu 24.04 LTStrafficserverpkg:deb/ubuntu/trafficserver?arch=source&distro=nobleOther threatsAffected
  • 9.2.1+ds-1build1 – 9.2.3+ds-1+deb12u1ubuntu0.1
8 affected builds
Fixed in–
Ubuntu Pro 22.04 LTStrafficserverpkg:deb/ubuntu/trafficserver?arch=source&distro=esm-apps/jammyOther threatsAffected
  • 8.1.1+ds-1.1 – 9.1.1+ds-2ubuntu0.1~esm1
5 affected builds
Fixed in–
Ubuntu Pro 20.04 LTStrafficserverpkg:deb/ubuntu/trafficserver?arch=source&distro=esm-apps/focalOther threatsAffected
  • 8.0.5+ds-1 – 8.0.5+ds-3ubuntu0.1~esm1
6 affected builds
Fixed in–
Ubuntu 18.04 LTStrafficserverpkg:deb/ubuntu/trafficserver?arch=source&distro=bionicOther threatsAffected
  • 7.0.0-5 – 7.1.2+ds-3
4 affected builds
Fixed in–
Ubuntu 16.04 LTStrafficserverpkg:deb/ubuntu/trafficserver?arch=source&distro=xenialOther threatsAffected
  • =5.3.0-2ubuntu1
  • =5.3.0-2ubuntu2
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Until a fix is available, monitor official Apache Traffic Server advisories for updates. No specific mitigation steps are provided in the available data.

Description

Apache Traffic Server versions including 5.3.0-2ubuntu1 through 9.2.3+ds-1+deb12u1build1 contain a critical vulnerability (CVE-2026-111816) where the server forwards a malformed 302 HTTP response improperly. This vulnerability has a high CVSS score of 9.3, indicating critical severity with potential impact on confidentiality and integrity. There is no public information on exploits in the wild or patch availability in the provided data.

References

Community reviews

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