Botan: Online OCSP redirects enable blind requests to internal HTTP services
Impact
Botan, a C++ cryptography library, has a vulnerability in versions prior to 3.13.0, where its online OCSP client allows a malicious responder or on-path attacker to make a blind request to an internal HTTP service. This enables blind SSRF, potentially affecting internal services. The issue is fixed in version 3.13.0.
Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.Affected packages
Affected products
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randombit · GitHub_M
botan
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randombit · GitHub_M
botan
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affected
< 3.13.0
Other versions: unknown
Original source 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.
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Original records
CVE-2026-118766View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.
cve.new JSON →Underlying weaknesses
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