CVE-2026-118768 (GCVE-0-2026-118768)

Vulnerability from cvelistv5 – Published: 2026-10-29 17:20 – Updated: 2026-10-29 17:20
VLAI
Title
Botan: CLI utility `ocsp_check` accepts unauthenticated responses
Summary
Botan is a C++ cryptography library. From 1.11.34 until 3.13.0, the botan ocsp_check command requested an OCSP response from a certificate's Authority Information Access URL without verifying the response signature or authorizing the signer. A malicious responder or on-path attacker could return a matching and timely GOOD response with an empty, invalid, or unauthorized signature, causing a revoked certificate to produce exit status 0 and OCSP check OK output. Only the command-line interface is affected. This issue is fixed in version 3.13.0.
Severity
5.9 (Medium)
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
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: >= 1.11.34, < 3.13.0
guessed Create a notification for this product.
Show details on NVD website
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{
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          "vendor": "randombit",
          "versions": [
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            }
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      ],
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          "value": "Botan is a C++ cryptography library. From 1.11.34 until 3.13.0, the botan ocsp_check command requested an OCSP response from a certificate\u0027s Authority Information Access URL without verifying the response signature or authorizing the signer. A malicious responder or on-path attacker could return a matching and timely GOOD response with an empty, invalid, or unauthorized signature, causing a revoked certificate to produce exit status 0 and OCSP check OK output. Only the command-line interface is affected. This issue is fixed in version 3.13.0."
        }
      ],
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            "vectorString": "CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-347",
              "description": "CWE-347: Improper Verification of Cryptographic Signature",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-29T17:20:05.577Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/randombit/botan/security/advisories/GHSA-mpr7-9494-4qcw",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/randombit/botan/security/advisories/GHSA-mpr7-9494-4qcw"
        },
        {
          "name": "https://github.com/randombit/botan/pull/5825",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/randombit/botan/pull/5825"
        },
        {
          "name": "https://github.com/randombit/botan/commit/46b2a9ca59b0797184fbf7537495bda6e61a1983",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/randombit/botan/commit/46b2a9ca59b0797184fbf7537495bda6e61a1983"
        }
      ],
      "source": {
        "advisory": "GHSA-mpr7-9494-4qcw",
        "discovery": "UNKNOWN"
      },
      "title": "Botan: CLI utility `ocsp_check` accepts unauthenticated responses"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-118768",
    "datePublished": "2026-10-29T17:20:05.577Z",
    "dateReserved": "2026-10-28T19:20:05.017Z",
    "dateUpdated": "2026-10-29T17:20:05.577Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-10-31",
      "epss": "0.0007",
      "percentile": "0.00034"
    },
    "nvd": {
      "cve": {
        "affected": [
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            "affectedData": [
              {
                "product": "botan",
                "vendor": "randombit",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003e= 1.11.34, \u003c 3.13.0"
                  }
                ]
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            ],
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          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Botan is a C++ cryptography library. From 1.11.34 until 3.13.0, the botan ocsp_check command requested an OCSP response from a certificate\u0027s Authority Information Access URL without verifying the response signature or authorizing the signer. A malicious responder or on-path attacker could return a matching and timely GOOD response with an empty, invalid, or unauthorized signature, causing a revoked certificate to produce exit status 0 and OCSP check OK output. Only the command-line interface is affected. This issue is fixed in version 3.13.0."
          }
        ],
        "id": "CVE-2026-118768",
        "lastModified": "2026-10-30T19:37:07.073",
        "metrics": {
          "cvssMetricV40": [
            {
              "cvssData": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "PRESENT",
                "attackVector": "ADJACENT",
                "availabilityRequirement": "NOT_DEFINED",
                "baseScore": 5.9,
                "baseSeverity": "MEDIUM",
                "confidentialityRequirement": "NOT_DEFINED",
                "exploitMaturity": "NOT_DEFINED",
                "integrityRequirement": "NOT_DEFINED",
                "modifiedAttackComplexity": "NOT_DEFINED",
                "modifiedAttackRequirements": "NOT_DEFINED",
                "modifiedAttackVector": "NOT_DEFINED",
                "modifiedPrivilegesRequired": "NOT_DEFINED",
                "modifiedSubAvailabilityImpact": "NOT_DEFINED",
                "modifiedSubConfidentialityImpact": "NOT_DEFINED",
                "modifiedSubIntegrityImpact": "NOT_DEFINED",
                "modifiedUserInteraction": "NOT_DEFINED",
                "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
                "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
                "modifiedVulnIntegrityImpact": "NOT_DEFINED",
                "privilegesRequired": "NONE",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "PASSIVE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
                "version": "4.0",
                "vulnAvailabilityImpact": "NONE",
                "vulnConfidentialityImpact": "NONE",
                "vulnIntegrityImpact": "HIGH",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
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              "type": "Secondary"
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        "published": "2026-10-29T18:17:28.997",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/randombit/botan/commit/46b2a9ca59b0797184fbf7537495bda6e61a1983"
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        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
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                "value": "CWE-347"
              }
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    },
    "redhat_vex": {
      "current_release_date": "2026-10-30T07:13:24+00:00",
      "cve": "CVE-2026-118768",
      "id": "CVE-2026-118768",
      "initial_release_date": "2026-10-29T17:20:05.577000+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "botan: botan: Certificate validation bypass via missing OCSP response signature verification",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-118768.json",
      "version": "3"
    }
  }
}



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