{"id":"CVE-2026-118769","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-118769","generatedAt":"2026-11-04T11:56:53.227Z","title":"In an application that accepts external algorithm parameter strings and uses the FFI raw ECB mode, an attacker can select the variable-block-size Lion cipher so that the reported size is truncated, the caller allocates insufficient memory, and later…","description":"Botan is a C++ cryptography library. From 2.1.0 until 3.13.0, the Botan C API function botan_block_cipher_block_size converted a size_t block size to int without a bounds check. In an application that accepts external algorithm parameter strings and uses the FFI raw ECB mode, an attacker can select the variable-block-size Lion cipher so that the reported size is truncated, the caller allocates insufficient memory, and later block processing causes memory corruption. The C++ API and normally used C API modes such as CBC and CTR are unaffected. This issue is fixed in version 3.13.0.","published":"2026-10-29T18:17:29.000Z","lastModified":"2026-10-30T19:37:07.000Z","status":"Awaiting Analysis","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":9.2,"severity":"CRITICAL","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/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/M"},"cwe":["CWE-125","CWE-681","CWE-787"],"affected":[],"epss":{"score":0.00365,"percentile":0.30396,"date":"2026-11-03","history":[{"date":"2026-10-30","score":0.00365,"percentile":0.30341}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.36%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-29T18:17:29.000Z","detail":{"score":"9.2","severity":"CRITICAL","publishedAt":"2026-10-29T18:17:29.180Z"},"summary":"New CVE, critical severity (CVSS 9.2)."}],"references":[{"url":"https://github.com/randombit/botan/commit/c6089ab7fab616517d56c447c93e13a5c57a0af3","source":"security-advisories@github.com"},{"url":"https://github.com/randombit/botan/pull/5805","source":"security-advisories@github.com"},{"url":"https://github.com/randombit/botan/security/advisories/GHSA-c68p-822g-jfvr","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-118769","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}