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CVSS 9.8 · CRITICAL

CVE-2026-41293

Improper Input Validation vulnerability 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 10.0.0-M1 through 10.0.27. Older, end of support versions may also be affected. Users are recommended to upgrade to version [FIXED_VERSION], which fixes the issue.

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Analysis

Apache Tomcat is affected by a critical vulnerability (CVSS 9.8) involving improper input validation across multiple major versions (9.0, 10.0, 10.1, and 11.0). This flaw likely allows for remote code execution or significant security bypasses, making immediate upgrades essential for any Java-based web infrastructure.

Severity

Score: 9.8(CRITICAL)
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV: NETWORK
AC: LOW
PR: NONE
UI: NONE
S: UNCHANGED
C: HIGH
I: HIGH
A: HIGH
Weakness (CWE): CWE-20

EPSS

Probability of exploitation (next 30 days): 0.0004 (0.0%)
Percentile: 11.1%
EPSS: 2026-05-14

Technical description

Improper Input Validation vulnerability 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 10.0.0-M1 through 10.0.27. Older, end of support versions may also be affected. Users are recommended to upgrade to version [FIXED_VERSION], which fixes the issue.

Published: 5/12/2026, 4:16:17 PM
Last modified: 5/14/2026, 8:17:04 PM

References

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