CVE-2026-43512

⛔ critical

Summary

DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication 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 before 7.0.0. Older unsupported versions any also be affect Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.

CVSS Score

9.8

Critical

EPSS Score

0.1

Exploit Probability

Published Date

2026-05-12

First Seen: 2026-05-17

📊 Relative Risk Intelligence

This CVE is Very High Risk - more severe than 90.5% of all 345,139 vulnerabilities in our database.

#32,849

Top 10% 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:H

CWE IDs (Weakness Types)

CWE-592

📦 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/7x09x7o12solvclslw3s...

Mailing List Vendor Advisory

http://www.openwall.com/lists/oss-security/2026/05/12/8

Mailing List Third Party Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-66299	⚠️ high	7.5	0.5	Uncontrolled Resource Consumption vulnerability in Apache Tomcat's WebSocket chat example. This issue affects Apache To...	2026-07-28
CVE-2026-59083	⛔ critical	9.1	0.4	Improper Handling of URL Encoding (Hex Encoding) vulnerability in Apache Tomcat's rewrite valve allowed security constra...	2026-07-14
CVE-2026-59084	⛔ critical	9.1	0.4	Insufficient Technical Documentation vulnerability in Apache Tomcat since the requirements to securely configure the Enc...	2026-07-14
CVE-2026-50229	🔶 medium	6.1	0.4	Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in the number guess example ...	2026-06-29
CVE-2026-53404	⚠️ high	7.3	0.4	Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat's rewrite valve meant that if the first cond...	2026-06-29
CVE-2026-53434	⛔ critical	9.1	0.4	Detection of Error Condition Without Action vulnerability in Apache Tomcat when configuring CRLs for a FFM based connect...	2026-06-29

These CVEs affect the same products