Botan is a C++ cryptography library. From version 3.0.0 to before version 3.11.0, during X509 path validation, OCSP responses were checked for an appropriate status code, but critically omitted verifying the signature of the OCSP response itself. This issue has been patched in version 3.11.0.
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Fixes

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Workaround

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History

Tue, 31 Mar 2026 03:00:00 +0000

Type Values Removed Values Added
Description Botan is a C++ cryptography library. From version 3.0.0 to before version 3.11.0, during X509 path validation, OCSP responses were checked for an appropriate status code, but critically omitted verifying the signature of the OCSP response itself. This issue has been patched in version 3.11.0.
Title Botan: Missing OCSP Response Signature Verification Allows MitM Certificate Revocation Bypass
Weaknesses CWE-347
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-30T20:36:30.579Z

Reserved: 2026-03-16T21:03:44.421Z

Link: CVE-2026-32883

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-03-30T21:17:09.933

Modified: 2026-03-30T21:17:09.933

Link: CVE-2026-32883

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses