{"id":"CVE-2026-118767","state":"PUBLISHED","title":"Botan: Python binding bcrypt APIs truncate passwords containing embedded NULs","description":"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.","publishedAt":"2026-10-29T17:17:24.323Z","updatedAt":"2026-10-30T17:12:36.136Z","severity":{"score":4.8,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["randombit botan"],"affected":[{"vendor":"randombit","product":"botan","versions":[{"version":">= 1.11.22, < 3.13.0","status":"affected"}]}],"references":["https://github.com/randombit/botan/security/advisories/GHSA-w8gj-5xrm-gvrp","https://github.com/randombit/botan/pull/5814","https://github.com/randombit/botan/commit/5a4ac737e72e18a08eca848049e3dd38571c73b4"],"weaknesses":["CWE-158"],"ingestedAt":"2026-10-30T17:18:06.571Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/118xxx/CVE-2026-118767.json","commit":"caca5991c38b96213066f41f1d69f02d92b92db0","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-118767","state":"PUBLISHED","datePublished":"2026-10-29T17:17:24.323Z","dateUpdated":"2026-10-30T17:12:36.136Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-28T19:20:05.017Z"},"containers":{"cna":{"title":"Botan: Python binding bcrypt APIs truncate passwords containing embedded NULs","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":[{"vendor":"randombit","product":"botan","versions":[{"version":">= 1.11.22, < 3.13.0","status":"affected"}]}],"references":[{"url":"https://github.com/randombit/botan/security/advisories/GHSA-w8gj-5xrm-gvrp","name":"https://github.com/randombit/botan/security/advisories/GHSA-w8gj-5xrm-gvrp","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/randombit/botan/pull/5814","name":"https://github.com/randombit/botan/pull/5814","tags":["x_refsource_MISC"]},{"url":"https://github.com/randombit/botan/commit/5a4ac737e72e18a08eca848049e3dd38571c73b4","name":"https://github.com/randombit/botan/commit/5a4ac737e72e18a08eca848049e3dd38571c73b4","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.8,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-158","lang":"en","description":"CWE-158: Improper Neutralization of Null Byte or NUL Character","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-29T17:17:24.323Z"},"source":{"advisory":"GHSA-w8gj-5xrm-gvrp","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-30T15:20:33.590831Z","id":"CVE-2026-118767","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-30T17:12:36.136Z"}}]}}}