CVE catalog
CVE-2026-55955
Improper Authentication vulnerability in Apache Tomcat allowed a replay attack against the EncryptionInterceptor in the cluster component. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.
- Severity
- Medium · CVSS 6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.44% · Oct 25, 2026
Improper Authentication vulnerability in Apache Tomcat allowed a replay attack against the EncryptionInterceptor in the cluster component. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.13 through 9.0.18, from 8.5.38 through 8.5.100, from 7.0.100 through 7.0.109. Users are recommended to upgrade to version 11.0.23, 10.1.56, 9.0.119, which fixes 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-2026-55955 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libtomcat10-embed-java]Affected
Source package: [tomcat10]
Details (6)
10.1.55-1~deb12u1· all · bookwormAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookwormAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.40-1~bpo12+1· all · bookworm-backportsAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.40-1~bpo12+1· all · bookworm-backportsAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookworm-securityAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookworm-securityAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- [libtomcat10-java]Affected
Source package: [tomcat10]
Details (6)
10.1.55-1~deb12u1· all · bookwormAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookwormAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.40-1~bpo12+1· all · bookworm-backportsAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.40-1~bpo12+1· all · bookworm-backportsAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookworm-securityAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookworm-securityAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- [tomcat10]Affected
Details (6)
10.1.55-1~deb12u1· all · bookwormAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookwormAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.40-1~bpo12+1· all · bookworm-backportsAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.40-1~bpo12+1· all · bookworm-backportsAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookworm-securityAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookworm-securityAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- [tomcat10-admin]Affected
Source package: [tomcat10]
Details (6)
10.1.55-1~deb12u1· all · bookwormAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookwormAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.40-1~bpo12+1· all · bookworm-backportsAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.40-1~bpo12+1· all · bookworm-backportsAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookworm-securityAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookworm-securityAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- [tomcat10-common]Affected
Source package: [tomcat10]
Details (6)
10.1.55-1~deb12u1· all · bookwormAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookwormAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.40-1~bpo12+1· all · bookworm-backportsAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.40-1~bpo12+1· all · bookworm-backportsAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookworm-securityAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookworm-securityAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- [tomcat10-docs]Affected
Source package: [tomcat10]
Details (6)
10.1.55-1~deb12u1· all · bookwormAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookwormAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.40-1~bpo12+1· all · bookworm-backportsAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.40-1~bpo12+1· all · bookworm-backportsAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookworm-securityAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookworm-securityAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- [tomcat10-examples]Affected
Source package: [tomcat10]
Details (6)
10.1.55-1~deb12u1· all · bookwormAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookwormAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.40-1~bpo12+1· all · bookworm-backportsAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.40-1~bpo12+1· all · bookworm-backportsAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookworm-securityAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookworm-securityAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- [tomcat10-user]Affected
Source package: [tomcat10]
Details (6)
10.1.55-1~deb12u1· all · bookwormAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookwormAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.40-1~bpo12+1· all · bookworm-backportsAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.40-1~bpo12+1· all · bookworm-backportsAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookworm-securityAffected
nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
10.1.55-1~deb12u1· all · bookworm-securityAffected
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 · trixieAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixieAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixie-securityAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixie-securityAffected
nvd · tomcat10 · debian · 13
- [libtomcat10-java]Affected
Source package: [tomcat10]
Details (4)
10.1.55-1~deb13u1· all · trixieAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixieAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixie-securityAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixie-securityAffected
nvd · tomcat10 · debian · 13
- [libtomcat11-embed-java]Affected
Source package: [tomcat11]
Details (4)
11.0.22-1~deb13u1· all · trixieAffected
nvd · tomcat11 · debian · 13
11.0.22-1~deb13u1· all · trixieAffected
nvd · tomcat11 · debian · 13
11.0.22-1~deb13u1· all · trixie-securityAffected
nvd · tomcat11 · debian · 13
11.0.22-1~deb13u1· all · trixie-securityAffected
nvd · tomcat11 · debian · 13
- [libtomcat11-java]Affected
Source package: [tomcat11]
Details (4)
11.0.22-1~deb13u1· all · trixieAffected
nvd · tomcat11 · debian · 13
11.0.22-1~deb13u1· all · trixieAffected
nvd · tomcat11 · debian · 13
11.0.22-1~deb13u1· all · trixie-securityAffected
nvd · tomcat11 · debian · 13
11.0.22-1~deb13u1· all · trixie-securityAffected
nvd · tomcat11 · debian · 13
- [tomcat10]Affected
Details (4)
10.1.55-1~deb13u1· all · trixieAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixieAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixie-securityAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixie-securityAffected
nvd · tomcat10 · debian · 13
- [tomcat10-admin]Affected
Source package: [tomcat10]
Details (4)
10.1.55-1~deb13u1· all · trixieAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixieAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixie-securityAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixie-securityAffected
nvd · tomcat10 · debian · 13
- [tomcat10-common]Affected
Source package: [tomcat10]
Details (4)
10.1.55-1~deb13u1· all · trixieAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixieAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixie-securityAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixie-securityAffected
nvd · tomcat10 · debian · 13
- [tomcat10-docs]Affected
Source package: [tomcat10]
Details (4)
10.1.55-1~deb13u1· all · trixieAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixieAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixie-securityAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixie-securityAffected
nvd · tomcat10 · debian · 13
- [tomcat10-examples]Affected
Source package: [tomcat10]
Details (4)
10.1.55-1~deb13u1· all · trixieAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixieAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixie-securityAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixie-securityAffected
nvd · tomcat10 · debian · 13
- [tomcat10-user]Affected
Source package: [tomcat10]
Details (4)
10.1.55-1~deb13u1· all · trixieAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixieAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixie-securityAffected
nvd · tomcat10 · debian · 13
10.1.55-1~deb13u1· all · trixie-securityAffected
nvd · tomcat10 · debian · 13
- [tomcat11]Affected
Details (4)
11.0.22-1~deb13u1· all · trixieAffected
nvd · tomcat11 · debian · 13
11.0.22-1~deb13u1· all · trixieAffected
nvd · tomcat11 · debian · 13
11.0.22-1~deb13u1· all · trixie-securityAffected
nvd · tomcat11 · debian · 13
11.0.22-1~deb13u1· all · trixie-securityAffected
nvd · tomcat11 · debian · 13
- [tomcat11-admin]Affected
Source package: [tomcat11]
Details (4)
11.0.22-1~deb13u1· all · trixieAffected
nvd · tomcat11 · debian · 13
11.0.22-1~deb13u1· all · trixieAffected
nvd · tomcat11 · debian · 13
11.0.22-1~deb13u1· all · trixie-securityAffected
nvd · tomcat11 · debian · 13
11.0.22-1~deb13u1· all · trixie-securityAffected
nvd · tomcat11 · debian · 13
Observed:
References
- [http://www.openwall.com/lists/oss-security/2026/06/29/24]
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_11195-1.json]
- [https://lists.apache.org/thread/g4p5sf45p3f9r011pwqs9r54yd64s106]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-55955]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-55955]
- [https://security-tracker.debian.org/tracker/CVE-2026-55955]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-55955.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3043.json]
[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]