CVE-2026-88041

CVE-2026-88041 · Apache Tomcat: HTTP/2 trailer header cross-contamination

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Incomplete cleanup vulnerability in Apache Tomcat allowed an trailer information from a previous request to leak into a subsequent request. This issue affects Apache Tomcat: from 11.0.0-M23 through 11.0.26, from 10.1.27 through 10.1.60, from 9.0.92 through 9.0.122. Users are recommended to upgrade to version 11.0.27, 10.1.61 or 9.0.123, which fix the issue.

EPSS 0.3% · Fix available

Published: 2026-10-20T13:43:28.681Z
Updated: 2026-10-20T18:10:05.285Z

Stack: system

Affected products and versions

apache tomcat
Versions
- ≥ 11.0.0-M23, ≤ 11.0.26: Affected (semver)
- ≥ 10.1.27, ≤ 10.1.60: Affected (semver)
- ≥ 9.0.92, ≤ 9.0.122: Affected (semver)
No fix published
tomcat10 Debian:12
Versions
- 10.1.10-1
- 10.1.13-1
- 10.1.14-1
- 10.1.15-1
- 10.1.16-1
- 10.1.20-1
- 10.1.23-1
- 10.1.25-1
- 10.1.25-1~bpo12+1
- 10.1.25-2
- 10.1.30-1
- 10.1.30-1~bpo12+1
- 10.1.31-1
- 10.1.33-1
- 10.1.33-1~bpo12+1
- 10.1.34-0+deb12u1
- 10.1.34-0+deb12u2
- 10.1.34-1
- 10.1.35-1
- 10.1.40-1
- 10.1.40-1~bpo12+1
- 10.1.46-1
- 10.1.52-1
- 10.1.52-1~deb12u1
- 10.1.52-1~deb13u1
- 10.1.52-2
- 10.1.54-1
- 10.1.55-1
- 10.1.55-1~deb12u1
- 10.1.55-1~deb13u1
- 10.1.6-1
- 10.1.6-1+deb12u1
- 10.1.6-1+deb12u2
- 10.1.60-1
- 10.1.7-1
- 10.1.8-1
- 10.1.9-1
Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
tomcat10 Debian:13
Versions
- 10.1.40-1
- 10.1.46-1
- 10.1.52-1
- 10.1.52-1~deb12u1
- 10.1.52-1~deb13u1
- 10.1.52-2
- 10.1.54-1
- 10.1.55-1
- 10.1.55-1~deb12u1
- 10.1.55-1~deb13u1
- 10.1.60-1
Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
tomcat10 Debian:14
Versions
- 10.1.40-1
- 10.1.46-1
- 10.1.52-1
- 10.1.52-1~deb12u1
- 10.1.52-1~deb13u1
- 10.1.52-2
- 10.1.54-1
- 10.1.55-1
- 10.1.55-1~deb12u1
- 10.1.55-1~deb13u1
- 10.1.60-1
Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
tomcat11 Debian:13
Versions
- 11.0.11-1
- 11.0.15-1
- 11.0.15-1~deb13u1
- 11.0.18-1
- 11.0.21-1
- 11.0.22-1
- 11.0.22-1~deb13u1
- 11.0.22-2
- 11.0.24-1
- 11.0.6-1
Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
tomcat11 Debian:14
Versions
- 11.0.11-1
- 11.0.15-1
- 11.0.15-1~deb13u1
- 11.0.18-1
- 11.0.21-1
- 11.0.22-1
- 11.0.22-1~deb13u1
- 11.0.22-2
- 11.0.24-1
- 11.0.6-1
Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
tomcat9 Debian:12
Affected ranges
- ECOSYSTEM: < 9.0.70-2
Update to 9.0.70-2
tomcat9 Debian:13
Affected ranges
- ECOSYSTEM: < 9.0.70-2
Update to 9.0.70-2
tomcat9 Debian:14
Affected ranges
- ECOSYSTEM: < 9.0.70-2
Update to 9.0.70-2
tomcat6 Ubuntu:Pro:14.04:LTS
Versions
- 6.0.37-1
- 6.0.39-1
- 6.0.39-1ubuntu0.1
- 6.0.39-1ubuntu0.1+esm1
- 6.0.39-1ubuntu0.1+esm2
- 6.0.39-1ubuntu0.1+esm3
Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
tomcat7 Ubuntu:Pro:14.04:LTS
Versions
- 7.0.42-1
- 7.0.47-1
- 7.0.50-1
- 7.0.52-1
- 7.0.52-1ubuntu0.1
- 7.0.52-1ubuntu0.3
- 7.0.52-1ubuntu0.6
- 7.0.52-1ubuntu0.7
- 7.0.52-1ubuntu0.8
- 7.0.52-1ubuntu0.9
- 7.0.52-1ubuntu0.10
- 7.0.52-1ubuntu0.11
- 7.0.52-1ubuntu0.13
- 7.0.52-1ubuntu0.14
- 7.0.52-1ubuntu0.15
- 7.0.52-1ubuntu0.16
- 7.0.52-1ubuntu0.16+esm1
- 7.0.52-1ubuntu0.16+esm2
Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
tomcat8 Ubuntu:Pro:16.04:LTS
Versions
- 8.0.26-1
- 8.0.28-1
- 8.0.30-1
- 8.0.32-1
- 8.0.32-1ubuntu1
- 8.0.32-1ubuntu1.1
- 8.0.32-1ubuntu1.2
- 8.0.32-1ubuntu1.3
- 8.0.32-1ubuntu1.4
- 8.0.32-1ubuntu1.5
- 8.0.32-1ubuntu1.6
- 8.0.32-1ubuntu1.7
- 8.0.32-1ubuntu1.8
- 8.0.32-1ubuntu1.9
- 8.0.32-1ubuntu1.10
- 8.0.32-1ubuntu1.11
- 8.0.32-1ubuntu1.13
- 8.0.32-1ubuntu1.13+esm1
- 8.0.32-1ubuntu1.13+esm2
Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
tomcat7 Ubuntu:Pro:16.04:LTS
Versions
- 7.0.64-1
- 7.0.68-1
- 7.0.68-1ubuntu0.1
- 7.0.68-1ubuntu0.3
- 7.0.68-1ubuntu0.4
- 7.0.68-1ubuntu0.4+esm1
- 7.0.68-1ubuntu0.4+esm2
- 7.0.68-1ubuntu0.4+esm3
- 7.0.68-1ubuntu0.4+esm4
Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
tomcat8 Ubuntu:Pro:18.04:LTS
Versions
- 8.5.21-1ubuntu1
- 8.5.29-1
- 8.5.30-1
- 8.5.30-1ubuntu1
- 8.5.30-1ubuntu1.2
- 8.5.30-1ubuntu1.3
- 8.5.30-1ubuntu1.4
- 8.5.39-1ubuntu1~18.04.1
- 8.5.39-1ubuntu1~18.04.2
- 8.5.39-1ubuntu1~18.04.3
- 8.5.39-1ubuntu1~18.04.3+esm1
- 8.5.39-1ubuntu1~18.04.3+esm2
- 8.5.39-1ubuntu1~18.04.3+esm3
- 8.5.39-1ubuntu1~18.04.3+esm4
- 8.5.39-1ubuntu1~18.04.3+esm5
- 8.5.39-1ubuntu1~18.04.3+esm6
Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
tomcat9 Ubuntu:Pro:18.04:LTS
Versions
- 9.0.16-3~18.04.1
- 9.0.16-3ubuntu0.18.04.1
- 9.0.16-3ubuntu0.18.04.2
- 9.0.16-3ubuntu0.18.04.2+esm1
- 9.0.16-3ubuntu0.18.04.2+esm2
- 9.0.16-3ubuntu0.18.04.2+esm3
- 9.0.16-3ubuntu0.18.04.2+esm4
- 9.0.16-3ubuntu0.18.04.2+esm5
- 9.0.16-3ubuntu0.18.04.2+esm6
- 9.0.16-3ubuntu0.18.04.2+esm7
- 9.0.16-3ubuntu0.18.04.2+esm8
Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
tomcat9 Ubuntu:Pro:20.04:LTS
Versions
- 9.0.24-1
- 9.0.27-1
- 9.0.31-1
- 9.0.31-1ubuntu0.1
- 9.0.31-1ubuntu0.2
- 9.0.31-1ubuntu0.3
- 9.0.31-1ubuntu0.4
- 9.0.31-1ubuntu0.5
- 9.0.31-1ubuntu0.6
- 9.0.31-1ubuntu0.7
- 9.0.31-1ubuntu0.8
- 9.0.31-1ubuntu0.9
- 9.0.31-1ubuntu0.9+esm1
- 9.0.31-1ubuntu0.9+esm2
- 9.0.31-1ubuntu0.9+esm3
Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
tomcat9 Ubuntu:Pro:22.04:LTS
Versions
- 9.0.43-3
- 9.0.54-1
- 9.0.55-1
- 9.0.58-1
- 9.0.58-1ubuntu0.1
- 9.0.58-1ubuntu0.1+esm1
- 9.0.58-1ubuntu0.1+esm2
- 9.0.58-1ubuntu0.1+esm3
- 9.0.58-1ubuntu0.1+esm4
- 9.0.58-1ubuntu0.2
- 9.0.58-1ubuntu0.2+esm1
- 9.0.58-1ubuntu0.2+esm2
- 9.0.58-1ubuntu0.2+esm3
- 9.0.58-1ubuntu0.2+esm4
Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
tomcat10 Ubuntu:24.04:LTS
Versions
- 10.1.10-1
- 10.1.14-1
- 10.1.15-1
- 10.1.16-1
- 10.1.16-1ubuntu0.1~esm1
- 10.1.16-1ubuntu0.1~esm2
- 10.1.16-1ubuntu0.1~esm3
- 10.1.16-1ubuntu0.1~esm4
- 10.1.55-1ubuntu2~24.04.1
Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
tomcat9 Ubuntu:24.04:LTS
Versions
- 9.0.70-1ubuntu1
- 9.0.70-2
- 9.0.70-2ubuntu0.1
- 9.0.70-2ubuntu0.1+esm1
- 9.0.70-2ubuntu0.1+esm2
- 9.0.70-2ubuntu0.1+esm3
- 9.0.118-1~24.04.1
Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
tomcat10 Ubuntu:26.10
Versions
- 10.1.40-1ubuntu1
- 10.1.54-1
- 10.1.54-1ubuntu1
- 10.1.54-1ubuntu2
- 10.1.55-1ubuntu1
- 10.1.55-1ubuntu2
- 10.1.57~us1-0ubuntu1
Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
tomcat11 Ubuntu:26.10
Versions
- 11.0.18-1
- 11.0.22-2
- 11.0.22-2ubuntu1
- 11.0.22-2ubuntu2
- 11.0.24-1ubuntu1
Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
tomcat9 Ubuntu:26.10
Versions
- 9.0.115-1
- 9.0.115-1ubuntu1
- 9.0.118-1
Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
tomcat10 Ubuntu:26.04:LTS
Versions
- 10.1.40-1ubuntu1
- 10.1.40-1ubuntu1.26.04.1
- 10.1.55-1ubuntu2~26.04.1
Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
tomcat9 Ubuntu:26.04:LTS
Versions
- 9.0.95-1ubuntu1
- 9.0.111-1
- 9.0.115-1
- 9.0.115-1ubuntu0.1
- 9.0.118-1~26.04.1
Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
tomcat11 Ubuntu:26.04:LTS
Versions
- 11.0.6-1
- 11.0.11-1
- 11.0.15-1
- 11.0.18-1
- 11.0.18-1ubuntu0.1~esm1
- 11.0.22-2ubuntu2~26.04.1
Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published

Original sources

Check your server →

CVE-2026-88041 · Apache Tomcat: HTTP/2 trailer header cross-contamination

Affected products and versions

apache tomcat

tomcat10 Debian:12

tomcat10 Debian:13

tomcat10 Debian:14

tomcat11 Debian:13

tomcat11 Debian:14

tomcat9 Debian:12

tomcat9 Debian:13

tomcat9 Debian:14

tomcat6 Ubuntu:Pro:14.04:LTS

tomcat7 Ubuntu:Pro:14.04:LTS

tomcat8 Ubuntu:Pro:16.04:LTS

tomcat7 Ubuntu:Pro:16.04:LTS

tomcat8 Ubuntu:Pro:18.04:LTS

tomcat9 Ubuntu:Pro:18.04:LTS

tomcat9 Ubuntu:Pro:20.04:LTS

tomcat9 Ubuntu:Pro:22.04:LTS

tomcat10 Ubuntu:24.04:LTS

tomcat9 Ubuntu:24.04:LTS

tomcat10 Ubuntu:26.10

tomcat11 Ubuntu:26.10

tomcat9 Ubuntu:26.10

tomcat10 Ubuntu:26.04:LTS

tomcat9 Ubuntu:26.04:LTS

tomcat11 Ubuntu:26.04:LTS

Original sources