CVE catalog

CVE-2026-55956

Improper Authorization vulnerability in Apache Tomcat leads to security constraints specified for the default servlet ignoring any method or method omission configured as part of the constraint. This

[CVE catalog]

Severity: Medium · CVSS 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Published: Jun 24, 2026, 5:15:25 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.69% · Oct 25, 2026

Improper Authorization vulnerability in Apache Tomcat leads to security constraints specified for the default servlet ignoring any method or method omission configured as part of the constraint. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119, 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	tomcat9	sid	`9.0.122-1`	fixed
Debian	tomcat9	forky	`9.0.122-1`	fixed
Debian	tomcat9	trixie	`9.0.95-1`	fixed
Debian	tomcat9	bookworm	`9.0.70-2`	fixed
Debian	tomcat10	sid	`10.1.60-1`	fixed
Debian	tomcat10	forky	`10.1.60-1`	fixed
Debian	tomcat10	trixie	`10.1.55-1~deb13u1`	vulnerable
Debian	tomcat10	trixie-security	`10.1.55-1~deb13u1`	vulnerable
Debian	tomcat10	bookworm	`10.1.55-1~deb12u1`	vulnerable
Debian	tomcat10	bookworm-security	`10.1.55-1~deb12u1`	vulnerable
Cpe	tomcat10	Not reported	Not reported	vulnerable
Cpe	tomcat	Not reported	`9.0.119`	fixed
Cpe	tomcat	Not reported	`10.1.56`	fixed
Cpe	tomcat	Not reported	`11.0.23`	fixed
Cpe	tomcat	Not reported	`11.0.23`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	tomcat9	source	sid	`9.0.70-2`	not yet assigned	Not reported	Not reported
Debian	tomcat9	source	forky	`9.0.70-2`	not yet assigned	Not reported	Not reported
Debian	tomcat9	source	trixie	`9.0.70-2`	not yet assigned	Not reported	Not reported
Debian	tomcat9	source	bookworm	`9.0.70-2`	not yet assigned	Not reported	Not reported
Debian	tomcat10	source	sid	`10.1.60-1`	not yet assigned	Not reported	[1141338]
Debian	tomcat10	source	forky	`10.1.60-1`	not yet assigned	Not reported	[1141338]
Debian	tomcat10	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1141338]
Debian	tomcat10	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1141338]
Cpe	tomcat	cpe	Not reported	`9.0.119`	Not reported	Not reported	Not reported
Cpe	tomcat	cpe	Not reported	`10.1.56`	Not reported	Not reported	Not reported
Cpe	tomcat	cpe	Not reported	`11.0.23`	Not reported	Not reported	Not reported
Cpe	tomcat	cpe	Not reported	`11.0.23`	Not reported	NVD-CVE-2026-55956	Not reported

[Debian bug #1141338]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libtomcat10-embed-java]Affected
Source package: [tomcat10]
Details (6)
- 10.1.55-1~deb12u1 · all · bookworm
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
[libtomcat10-java]Affected
Source package: [tomcat10]
Details (6)
- 10.1.55-1~deb12u1 · all · bookworm
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
[tomcat10]Affected
Details (6)
- 10.1.55-1~deb12u1 · all · bookworm
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
[tomcat10-admin]Affected
Source package: [tomcat10]
Details (6)
- 10.1.55-1~deb12u1 · all · bookworm
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
[tomcat10-common]Affected
Source package: [tomcat10]
Details (6)
- 10.1.55-1~deb12u1 · all · bookworm
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
[tomcat10-docs]Affected
Source package: [tomcat10]
Details (6)
- 10.1.55-1~deb12u1 · all · bookworm
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
[tomcat10-examples]Affected
Source package: [tomcat10]
Details (6)
- 10.1.55-1~deb12u1 · all · bookworm
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
[tomcat10-user]Affected
Source package: [tomcat10]
Details (6)
- 10.1.55-1~deb12u1 · all · bookworm
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Affected
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12

[Debian 13 (Trixie)]

[libtomcat10-embed-java]Affected
Source package: [tomcat10]
Details (4)
- 10.1.55-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat10 · debian · 13
[libtomcat10-java]Affected
Source package: [tomcat10]
Details (4)
- 10.1.55-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat10 · debian · 13
[libtomcat11-embed-java]Affected
Source package: [tomcat11]
Details (4)
- 11.0.22-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat11 · debian · 13
- 11.0.22-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat11 · debian · 13
- 11.0.22-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat11 · debian · 13
- 11.0.22-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat11 · debian · 13
[libtomcat11-java]Affected
Source package: [tomcat11]
Details (4)
- 11.0.22-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat11 · debian · 13
- 11.0.22-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat11 · debian · 13
- 11.0.22-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat11 · debian · 13
- 11.0.22-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat11 · debian · 13
[tomcat10]Affected
Details (4)
- 10.1.55-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat10 · debian · 13
[tomcat10-admin]Affected
Source package: [tomcat10]
Details (4)
- 10.1.55-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat10 · debian · 13
[tomcat10-common]Affected
Source package: [tomcat10]
Details (4)
- 10.1.55-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat10 · debian · 13
[tomcat10-docs]Affected
Source package: [tomcat10]
Details (4)
- 10.1.55-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat10 · debian · 13
[tomcat10-examples]Affected
Source package: [tomcat10]
Details (4)
- 10.1.55-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat10 · debian · 13
[tomcat10-user]Affected
Source package: [tomcat10]
Details (4)
- 10.1.55-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat10 · debian · 13
[tomcat11]Affected
Details (4)
- 11.0.22-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat11 · debian · 13
- 11.0.22-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat11 · debian · 13
- 11.0.22-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat11 · debian · 13
- 11.0.22-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat11 · debian · 13
[tomcat11-admin]Affected
Source package: [tomcat11]
Details (4)
- 11.0.22-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat11 · debian · 13
- 11.0.22-1~deb13u1 · all · trixie
  Affected
  nvd · tomcat11 · debian · 13
- 11.0.22-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat11 · debian · 13
- 11.0.22-1~deb13u1 · all · trixie-security
  Affected
  nvd · tomcat11 · debian · 13

Next results

Observed: Oct 27, 2026, 7:14:00 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]