CVE-2026-118767

{
  "id": "CVE-2026-118767",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-29T18:17:28.853",
  "lastModified": "2026-10-29T18:17:28.853",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Botan is a C++ cryptography library. From 1.11.22 until 3.13.0, Botan's Python binding converted Python strings containing U+0000 to const char* values without consistently rejecting the embedded NUL, causing bcrypt and check_bcrypt to process only the prefix before the NUL. Applications could validate a longer password but hash a shorter effective value, allowing application password-policy bypass; scrypt and argon2 are unaffected. This issue is fixed in version 3.13.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "randombit",
          "product": "botan",
          "versions": [
            {
              "version": ">= 1.11.22, < 3.13.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "baseScore": 4.8,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 2.5
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-158"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/randombit/botan/commit/5a4ac737e72e18a08eca848049e3dd38571c73b4",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/randombit/botan/pull/5814",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/randombit/botan/security/advisories/GHSA-w8gj-5xrm-gvrp",
      "source": "[email protected]"
    }
  ]
}