Vulnerability Description
Botan is a C++ cryptography library. Prior to 3.13.0, Botan's online OCSP client allowed a single HTTP redirect while posting an OCSP request to the URI in a certificate's Authority Information Access extension. A malicious OCSP responder or an on-path attacker could redirect the client to make one blind request to an otherwise unreachable internal HTTP service. The primary impact is blind SSRF that might affect internal services with non-idempotent GET handlers, and response timing can provide a coarse internal-service oracle. This issue is fixed in version 3.13.0.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/randombit/botan/commit/9791ca39a556c76186b1fc943c7d8d460712d5
- https://github.com/randombit/botan/pull/5815
- https://github.com/randombit/botan/security/advisories/GHSA-9qgq-q9j4-4f82
FAQ
What is CVE-2026-118766?
CVE-2026-118766 is a vulnerability with a CVSS score of 6.1 (MEDIUM). Botan is a C++ cryptography library. Prior to 3.13.0, Botan's online OCSP client allowed a single HTTP redirect while posting an OCSP request to the URI in a certificate's Authority Information Access...
How severe is CVE-2026-118766?
CVE-2026-118766 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-118766?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.