Authentication bypass via mishandled OCSP retry responses
Published Apr 9, 2026 · Updated Apr 9, 2026
Improper authentication in Apache Tomcat and Tomcat Native allows remote attackers with revoked client certificates to bypass CLIENT_CERT checks. The OCSP response handler accepts a TRY_AGAIN response without setting a verification error even when soft fail is disabled. Exposure requires CLIENT_CERT authentication with OCSP enabled and an attacker-held certificate that should be rejected, allowing access protected by certificate authentication.
Summary
What happened
Improper authentication in Apache Tomcat and Tomcat Native allows remote attackers with revoked client certificates to bypass CLIENT_CERT checks. The OCSP response handler accepts a TRY_AGAIN response without setting a verification error even when soft fail is disabled. Exposure requires CLIENT_CERT authentication with OCSP enabled and an attacker-held certificate that should be rejected, allowing access protected by certificate authentication.
The record
- CVE
- CVE-2026-29145
- Published
- Apr 9, 2026
- Updated
- Apr 9, 2026
- Vendor
- The Apache Software Foundation
- Product
- Apache Tomcat Native
- Classifications
- CWE-287, T1078
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 9, 2026CVE publishedPublication date reported by the CVE source.
- Apr 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.1.23 <=1.1.34
- Affected versionversion=1.2.0 <=1.2.39
- Affected versionversion=1.3.0 <=1.3.6
- Affected versionversion=2.0.0 <=2.0.13
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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