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Apache Tomcat CVE-2026-73581

| EUVDEUVD-2026-85222 MEDIUM
Improper Check for Certificate Revocation (CWE-299)
2026-09-23 apache GHSA-cf68-55f3-8gfw
Apache Java Information Disclosure OpenSSL Red Hat Tomcat Suse Apache Tomcat Apache Software Foundation
6.5
CVSS 3.1 · Vendor: apache
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Severity by source

Vendor (apache) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
vuln.today AI
4.8 MEDIUM

Remote (AV:N) with no prior valid credentials (PR:N, attacker uses own revoked cert), but AC:H because it needs an OpenSSL/FFM+keystore+CRL config and a previously-valid-now-revoked cert; limited C/I impact from revoked-access acceptance.

3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
4.0 AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
SUSE
MEDIUM
qualitative
Red Hat
6.5 MEDIUM
qualitative

Primary rating from Vendor (apache).

CVSS VectorVendor: apache

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

4
CVSS changed
Sep 23, 2026 - 16:22 NVD
6.5 (MEDIUM)
Metadata Corrected
Sep 23, 2026 - 12:40 vuln.today
tag: Java added
Analysis Generated
Sep 23, 2026 - 11:53 vuln.today
CVE Published
Sep 23, 2026 - 11:08 cve.org
MEDIUM

DescriptionCVE.org

Improper Check for Certificate Revocation vulnerability in Apache Tomcat. Both the OpenSSL and OpenSSL-FFM TLS implementations ignore CRLs when certificate uses a keystore.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.58, from 9.0.0-M1 through 9.0.121.

The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100. Other unsupported versions may also be affected.

Users are recommended to upgrade to version 11.0.26, 10.1.59, 9.0.122, which fixes the issue.

AnalysisAI

Apache Tomcat's OpenSSL and OpenSSL-FFM TLS connectors ignore certificate revocation lists when the certificate is loaded from a keystore, so a client certificate that has already been revoked can still be accepted for mutual-TLS authentication. Affected releases are 11.0.0-M1 through 11.0.25, 10.1.0-M1 through 10.1.58, and 9.0.0-M1 through 9.0.121, with end-of-life 8.5.0 through 8.5.100 also known to be affected; fixed versions are 11.0.26, 10.1.59, and 9.0.122. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Impact
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Vulnerability AssessmentAI

Exploitation Requires Tomcat configured to terminate TLS with the OpenSSL or OpenSSL-FFM implementation (not the default JSSE/NIO) using a keystore, with mutual-TLS client-certificate authentication AND CRL-based revocation checking enabled. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment No CVSS vector, EPSS, KEV entry, or POC is present in the input, so quantitative exploitation signals are entirely absent and must be flagged as MISSING rather than inferred. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade to a fixed release: Apache Tomcat 11.0.26, 10.1.59, or 9.0.122, per the vendor advisory at https://lists.apache.org/thread/r0dj3h1pbn4wv96fhsfrnz3t6874t6do. … Detailed patch versions, workarounds, and compensating controls in full report.
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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise Module for Basesystem 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS Fixed

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CVE-2026-73581 vulnerability details – vuln.today
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