CVE-2026-32883

MEDIUM

Botan: Missing OCSP Response Signature Verification Allows MitM Certificate Revocation Bypass

Title source: cna

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.

References (1)

[X_Refsource_Confirm] https://github.com/randombit/botan/security/advisories/GHSA-9j2j-hqmc-hf5x

Scores

CVSS v3 5.9

EPSS 0.0002

EPSS Percentile 4.1%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Details

CWE

CWE-347

Status published

Products (2)

botan_project/botan 3.0.0 - 3.11.0

randombit/botan >= 3.0.0, < 3.11.0

Published Mar 30, 2026

Tracked Since Mar 31, 2026