6.5

CVE-2026-34500: apache software foundation apache tomcat Improper Authentication

CVSS: 6.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-34500DEBIAN-CVE-2026-34500CGA-hgj5-9fv7-g7cm
Published 09-04-2026Last modified 10-04-2026
Open JSON

Vulnerability summary

CVE-2026-34500 is a medium (CVSS 6.5) Improper Authentication vulnerability in apache software foundation apache tomcat. EPSS estimates a 0.45% chance of exploitation in the next 30 days, higher than 37.7% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.45%
0%100%
Low · -0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 13 · Related 11
MGASA-2026-0095OPENSUSE-SU-2026:10547-1OPENSUSE-SU-2026:10548-1OPENSUSE-SU-2026:10549-1OPENSUSE-SU-2026:20595-1OPENSUSE-SU-2026:20611-1

Timeline

  1. 09-04-2026
    PublishedVulnerability first disclosed.
  2. 10-04-2026
    Last modifiedVulnerability information updated.

Description

CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled and FFM is used in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M14 through 11.0.20, from 10.1.22 through 10.1.53, from 9.0.92 through 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fixes the issue.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.45%

Chance of exploitation in the next 30 days

Percentile

38%

Versus all other CVEs

30-day change

-0.02 pp

From 0.47% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.45%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard20 products
  • camunda-8.8< 8.8.22-r0
  • camunda-zeebe-8.6< 8.6.39-r0
  • camunda-zeebe-8.7< 8.7.27-r0
  • camunda-zeebe-8.8< 8.8.22-r0
  • kayenta-2025.0< 2025.0.8-r11
Debian3 products
  • tomcat10< 10.1.55-1~deb12u1 | < 10.1.55-1~deb13u1 | < 10.1.54-1
  • tomcat11< 11.0.22-1~deb13u1 | < 11.0.21-1
  • tomcat9< 9.0.70-2
Ubuntu3 products
  • tomcat10All versions (No fix recorded)
  • tomcat11All versions (No fix recorded)
  • tomcat9All versions (No fix recorded)
Wolfi2 products
  • thingsboard-tb-mqtt-transport< 4.3.1.1-r11
  • thingsboard-tb-node< 4.3.1.1-r11
Apache1 product
  • tomcat≥ 9.0.92, < 9.0.117 | ≥ 10.1.22, < 10.1.54 | ≥ 11.0.1, < 11.0.21 | 11.0.0:milestone14 | 11.0.0:milestone15 | 11.0.0:milestone16 | 11.0.0:milestone17 | 11.0.0:milestone18 | 11.0.0:milestone19 | 11.0.0:milestone20 | 11.0.0:milestone21 | 11.0.0:milestone22 | 11.0.0:milestone23 | 11.0.0:milestone24 | 11.0.0:milestone25 | 11.0.0:milestone26
Apache software foundation1 product
  • apache tomcat≥ 11.0.0-M14, ≤ 11.0.20 | ≥ 10.1.22, ≤ 10.1.53 | ≥ 9.0.92, ≤ 9.0.116
Org.apache.tomcat1 product
  • tomcat-coyote-ffm≥ 9.0.92, < 9.0.117 | ≥ 10.1.22, < 10.1.54 | ≥ 11.0.0-M14, < 11.0.21

7 vendors · 31 products

References

14 links
Show all 14 references