CVE catalog

CVE-2026-111817

trafficserver: CVE-2026-111817

Severity: Medium · CVSS 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published: Oct 21, 2026, 7:47:34 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.36% · Oct 25, 2026

Apache Traffic Server can stall a chunked transfer that it passes through with its trailers removed (proxy.config.http.drop_chunked_trailers) until the connection times out, because it waits for the trailer bytes it has already dropped. Trailer dropping is on by default in 10.x. In 8.1.11 and 9.2.x it is off by default, and those versions are affected only if it is enabled. This issue affects Apache Traffic Server: 8.1.11, from 9.2.5 through 9.2.15, from 10.0.0 through 10.1.4, 10.2.0. Users are recommended to upgrade to version 10.1.5 or 10.2.1, which fix the issue.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	trafficserver	bookworm	`9.2.5+ds-0+deb12u4`	vulnerable
Debian	trafficserver	bookworm-security	`9.2.5+ds-0+deb12u4`	vulnerable
Ubuntu	trafficserver	16.04	`5.3.0-2ubuntu1`	vulnerable
Ubuntu	trafficserver	16.04	`5.3.0-2ubuntu2`	vulnerable
Ubuntu	trafficserver	18.04	`7.0.0-5`	vulnerable
Ubuntu	trafficserver	18.04	`7.1.2+ds-2`	vulnerable
Ubuntu	trafficserver	18.04	`7.1.2+ds-2build1`	vulnerable
Ubuntu	trafficserver	18.04	`7.1.2+ds-3`	vulnerable
Ubuntu	trafficserver	pro	`8.1.1+ds-1.1`	vulnerable
Ubuntu	trafficserver	pro	`9.1.1+ds-2build1`	vulnerable
Ubuntu	trafficserver	pro	`9.1.1+ds-2ubuntu0.1~esm1`	vulnerable
Ubuntu	trafficserver	pro	`9.1.1+ds-2ubuntu0.1`	vulnerable
Ubuntu	trafficserver	pro	`9.1.1+ds-2ubuntu0.1+esm1`	vulnerable
Ubuntu	trafficserver	24.04	`9.2.1+ds-1build1`	vulnerable
Ubuntu	trafficserver	24.04	`9.2.2+ds-1`	vulnerable
Ubuntu	trafficserver	24.04	`9.2.3+ds-1`	vulnerable
Ubuntu	trafficserver	24.04	`9.2.3+ds-1+deb12u1`	vulnerable
Ubuntu	trafficserver	24.04	`9.2.3+ds-1+deb12u1build1`	vulnerable
Ubuntu	trafficserver	24.04	`9.2.3+ds-1+deb12u1build3`	vulnerable
Ubuntu	trafficserver	24.04	`9.2.3+ds-1+deb12u1build4`	vulnerable
Ubuntu	trafficserver	24.04	`9.2.3+ds-1+deb12u1ubuntu0.1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	trafficserver	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[trafficserver]Affected
Details (4)
- 9.2.5+ds-0+deb12u4 · amd64 · bookworm
  Affected
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · arm64 · bookworm
  Affected
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · amd64 · bookworm-security
  Affected
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · arm64 · bookworm-security
  Affected
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
[trafficserver-dev]Affected
Source package: [trafficserver]
Details (4)
- 9.2.5+ds-0+deb12u4 · amd64 · bookworm
  Affected
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · arm64 · bookworm
  Affected
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · amd64 · bookworm-security
  Affected
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · arm64 · bookworm-security
  Affected
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
[trafficserver-experimental-plugins]Affected
Source package: [trafficserver]
Details (4)
- 9.2.5+ds-0+deb12u4 · amd64 · bookworm
  Affected
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · arm64 · bookworm
  Affected
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · amd64 · bookworm-security
  Affected
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · arm64 · bookworm-security
  Affected
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12

Observed: Oct 25, 2026, 2:52:12 AM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]