9.1

CVE-2026-43515: apache software foundation apache tomcat Improper Authorization

CVSS: 9.1v3.1CriticalAnalyzed
AliasesUBUNTU-CVE-2026-43515DEBIAN-CVE-2026-43515CGA-5wx9-g8f5-f488
Published 12-05-2026Last modified 04-06-2026
Open JSON

Vulnerability summary

CVE-2026-43515 is a critical (CVSS 9.1) Improper Authorization vulnerability in apache software foundation apache tomcat. EPSS estimates a 1.22% chance of exploitation in the next 30 days, higher than 68.2% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.1/10
010
Critical · v3.1 (CVE.org)
EPSS score
1.22%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 29 · Related 17
MGASA-2026-0139OPENSUSE-SU-2026:10925-1OPENSUSE-SU-2026:10926-1OPENSUSE-SU-2026:10927-1OPENSUSE-SU-2026:21117-1OPENSUSE-SU-2026:21121-1

Timeline

  1. 12-05-2026
    PublishedVulnerability first disclosed.
  2. 04-06-2026
    Last modifiedVulnerability information updated.

Description

Improper Authorization vulnerability when multiple method constraints define an HTTP method for the same extension in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

1.22%

Chance of exploitation in the next 30 days

Percentile

68%

Versus all other CVEs

30-day change

0.00 pp

From 1.22% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.22%

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-8.9< 8.9.5-r2
  • camunda-zeebe-8.6< 8.6.39-r12
  • camunda-zeebe-8.7< 8.7.29-r1
  • camunda-zeebe-8.8< 8.8.24-r1
  • camunda-zeebe-8.9< 8.9.5-r2
Ubuntu6 products
  • tomcat10< 10.1.16-1ubuntu0.1~esm4 | < 10.1.40-1ubuntu1.25.10.1 | < 10.1.40-1ubuntu1.26.04.1
  • tomcat11All versions (No fix recorded) | < 11.0.18-1ubuntu0.1~esm1
  • tomcat6< 6.0.39-1ubuntu0.1+esm3
  • tomcat7< 7.0.52-1ubuntu0.16+esm2 | < 7.0.68-1ubuntu0.4+esm4
  • tomcat8< 8.0.32-1ubuntu1.13+esm2 | < 8.5.39-1ubuntu1~18.04.3+esm6
Debian3 products
  • tomcat10< 10.1.55-1~deb12u1 | < 10.1.55-1~deb13u1 | < 10.1.55-1
  • tomcat11< 11.0.22-1~deb13u1 | < 11.0.22-1
  • tomcat9< 9.0.70-2
Org.apache.tomcat2 products
  • tomcat< 9.0.118 | ≥ 10.1.0-M1, < 10.1.55 | ≥ 11.0.0-M1, < 11.0.22
  • tomcat-catalina< 9.0.118 | ≥ 10.1.0-M1, < 10.1.55 | ≥ 11.0.0-M1, < 11.0.22
Wolfi2 products
  • thingsboard-tb-mqtt-transport< 4.3.1.2-r0
  • thingsboard-tb-node< 4.3.1.2-r0
Apache1 product
  • tomcat≥ 7.0.0, ≤ 7.0.109 | ≥ 8.5.0, ≤ 8.5.100 | ≥ 9.0.0, < 9.0.118 | ≥ 10.1.0, < 10.1.55 | ≥ 11.0.0, < 11.0.22
Apache software foundation1 product
  • apache tomcat≥ 11.0.0-M1, ≤ 11.0.21 | ≥ 10.1.0-M1, ≤ 10.1.54 | ≥ 9.0.0.M1, ≤ 9.0.117 | ≥ 8.5.0, ≤ 8.5.100 | ≥ 7.0.0, ≤ 7.0.109
Org.apache.tomcat.embed1 product
  • tomcat-embed-core< 9.0.118 | ≥ 10.1.0-M1, < 10.1.55 | ≥ 11.0.0-M1, < 11.0.22

8 vendors · 36 products

References

18 links
Show all 18 references