CVE-2026-118766 (GCVE-0-2026-118766)

Vulnerability from cvelistv5 – Published: 2026-10-29 17:14 – Updated: 2026-10-29 17:14
VLAI
Title
Botan: Online OCSP redirects enable blind requests to internal HTTP services
Summary
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.
Severity
6.1 (Medium)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 8129 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
randombit botan Affected: < 3.13.0
guessed Create a notification for this product.
Show details on NVD website
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{
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          "value": "Botan is a C++ cryptography library. Prior to 3.13.0, Botan\u0027s online OCSP client allowed a single HTTP redirect while posting an OCSP request to the URI in a certificate\u0027s 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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          }
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              "type": "CWE"
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      "providerMetadata": {
        "dateUpdated": "2026-10-29T17:14:47.676Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
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          "name": "https://github.com/randombit/botan/security/advisories/GHSA-9qgq-q9j4-4f82",
          "tags": [
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          "url": "https://github.com/randombit/botan/security/advisories/GHSA-9qgq-q9j4-4f82"
        },
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        }
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      "source": {
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        "discovery": "UNKNOWN"
      },
      "title": "Botan: Online OCSP redirects enable blind requests to internal HTTP services"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-118766",
    "datePublished": "2026-10-29T17:14:47.676Z",
    "dateReserved": "2026-10-28T19:20:05.017Z",
    "dateUpdated": "2026-10-29T17:14:47.676Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-10-31",
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      "percentile": "0.00695"
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                "vendor": "randombit",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c 3.13.0"
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        "cveTags": [],
        "descriptions": [
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            "value": "Botan is a C++ cryptography library. Prior to 3.13.0, Botan\u0027s online OCSP client allowed a single HTTP redirect while posting an OCSP request to the URI in a certificate\u0027s 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."
          }
        ],
        "id": "CVE-2026-118766",
        "lastModified": "2026-10-30T19:37:07.073",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
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                "attackVector": "ADJACENT_NETWORK",
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                "baseScore": 6.1,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
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          },
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          }
        ],
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        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
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            "description": [
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                "lang": "en",
                "value": "CWE-918"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Primary"
          }
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    },
    "redhat_vex": {
      "current_release_date": "2026-10-30T07:13:24+00:00",
      "cve": "CVE-2026-118766",
      "id": "CVE-2026-118766",
      "initial_release_date": "2026-10-29T17:14:47.676000+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "botan: Botan: Server-Side Request Forgery via OCSP client HTTP redirect",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-118766.json",
      "version": "3"
    }
  }
}



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