CVE-2026-118766

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{"bugzilla": {"description": "botan: Botan: Server-Side Request Forgery via OCSP client HTTP redirect", "id": "2563611", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2563611"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L", "status": "draft"}, "cwe": "CWE-918", "details": ["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.", "A flaw was found in Botan. Its Online Certificate Status Protocol (OCSP) client improperly follows HTTP redirects when sending certificate validation requests. A malicious responder or network attacker can exploit this issue to redirect the client into making a blind request to an otherwise inaccessible internal service. This Server-Side Request Forgery (SSRF) flaw can allow attackers to interact with internal systems or infer internal service availability via response timing."], "name": "CVE-2026-118766", "public_date": "2026-10-29T17:14:47Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-118766\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-118766\nhttps://github.com/randombit/botan/commit/9791ca39a556c76186b1fc943c7d8d460712d58f\nhttps://github.com/randombit/botan/pull/5815\nhttps://github.com/randombit/botan/security/advisories/GHSA-9qgq-q9j4-4f82"], "statement": "This vulnerability is rated as Moderate severity because exploitation is restricted to blind, single-request server-side request forgery without direct content exfiltration, requiring an adversarial certificate responder or an in-path attacker. Botan is not distributed as part of core Red Hat Enterprise Linux and is only consumed via community repositories such as EPEL. Risk is further constrained to applications that explicitly initiate online certificate revocation checks over unmanaged network paths.", "threat_severity": "Moderate"}

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