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VulnerabilityPublished Updated

CVE-2026-111814: Trafficserver · (Apache Traffic Server's default outbound session-sharing policy can re ...)

Affects trafficserverSource GCVE Database

0
Authoritative record:CVE-2026-111814· Critical 10.0

Not known to be exploited · CVSS 10.0 Critical.

Data as of 27 Oct 2026, 07:57 UTC

CVSS 3.1 base score
10.0Critical
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:H/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

In the meantime, consider reviewing and adjusting session-sharing policies if possible to reduce exposure.

Description

Apache Traffic Server contains a critical vulnerability (CVE-2026-111814) related to its default outbound session-sharing policy. This flaw allows an attacker to potentially reuse session information across different outbound connections, leading to a complete compromise of confidentiality and integrity without requiring user interaction. The vulnerability affects multiple specific versions of Traffic Server as listed. The CVSS score is 10.0, indicating a critical severity with network attack vector, low complexity, no privileges required, no user interaction, and scope changed. No public exploits or patches are currently documented in the provided data.

References

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