6.1
MediumCVSS 3.1 · from GitHub_M
CVE-2026-118766
Botan: Online OCSP redirects enable blind requests to internal HTTP services
botan · Server-side request forgery · CWE-918Affectedbotan
FixNo fix listed yet.
PublishedOct 29, 17:14 · GitHub_M
ScoredOct 29 · 6.1 · GitHub_M
Exploit code publicNone known · checked 21:18 UTC
ExploitedNone known · CISA KEV checked 22:11 UTC
What we know
No known exploitation. CISA KEV, checked 22:11 UTC.
No public exploit code known. Exploit-DB, Metasploit, Nuclei, checked 21:18 UTC.
An attacker has to be on the same network. CVSS: adjacent network.
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.
From GitHub_M
Affected and fixed versions
ProductAffectedFixed inbotan< 3.13.0–
Exploit code
Exploit-DBnone knownMetasploitnone knownNucleinone known