CVE-2026-43515

⛔ critical

Summary

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 Score

9.1

Critical

EPSS Score

0.1

Exploit Probability

Published Date

2026-05-12

First Seen: 2026-05-17

📊 Relative Risk Intelligence

This CVE is High Risk - more severe than 87.7% of all 325,703 vulnerabilities in our database.

#40,069

Top 25% most severe

Severity Percentile

🎯 CISA SSVC Assessment Updated: May 14, 2026

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

YES

Can be exploited automatically

💥 Technical Impact

Total

Complete system compromise possible

SSVC data provided by CISA

Last Modified 2026-05-15

Source NVD 🔗

CVSS Vector 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CWE IDs (Weakness Types)

CWE-285

📦 Affected Products 5

Vendor	Product	Status	Affected Versions
apache	tomcat	Affected	> 10.1.0 < 10.1.55
apache	tomcat	Affected	> 11.0.0 < 11.0.22
apache	tomcat	Affected	> 7.0.0 < 7.0.109
apache	tomcat	Affected	> 8.5.0 < 8.5.100
apache	tomcat	Affected	> 9.0.0 < 9.0.118

🔗 References 2

https://lists.apache.org/thread/746nxfxod0wsocxtmv8p...

Mailing List Vendor Advisory

http://www.openwall.com/lists/oss-security/2026/05/1...

Mailing List Third Party Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-41284	⚠️ high	7.5	0.1	Allocation of Resources Without Limits or Throttling vulnerability in Apache Tomcat. This issue affects Apache Tomcat: ...	2026-05-12
CVE-2026-41293	⛔ critical	9.8	0.2	Improper Input Validation vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0...	2026-05-12
CVE-2026-42498	⚠️ high	7.3	0.1	Exposure of HTTP Authentication Header to unexpected hosts during WebSocket authentication vulnerability in Apache Tomca...	2026-05-12
CVE-2026-43512	⛔ critical	9.8	0.1	DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication in Apache Tomcat. This issue affects Ap...	2026-05-12
CVE-2026-43513	⚠️ high	7.5	0.1	Improper Handling of Case Sensitivity vulnerability in LockOutRealm in Apache Tomcat. This issue affects Apache Tomcat:...	2026-05-12
CVE-2026-43514	ℹ️ low	3.7	0.1	Observable Timing Discrepancy vulnerability when comparing AJP secret in Apache Tomcat. This issue affects Apache Tomc...	2026-05-12

These CVEs affect the same products