Bug 2453204 (CVE-2026-32883)

Summary: CVE-2026-32883 Botan: Botan: Compromised certificate validation integrity via unverified OCSP response signatures
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Botan. A remote attacker could exploit a vulnerability in the X509 path validation process where the signature of Online Certificate Status Protocol (OCSP) responses was not verified. This omission allows an attacker to provide forged OCSP responses, potentially leading to the acceptance of revoked certificates and compromising the integrity of the certificate validation.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2453750, 2453751, 2453752, 2453753, 2453754, 2453755    
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Description OSIDB Bzimport 2026-03-30 21:02:28 UTC
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.