CVE-2026-118769
Severity not reportedBotan is a C++ cryptography library.
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.
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/randombit/botan/commit/c6089ab7fab616517d56c447c93e13a5c57a0af3 security-advisories@github.com
- https://github.com/randombit/botan/pull/5805 security-advisories@github.com
- https://github.com/randombit/botan/security/advisories/GHSA-c68p-822g-jfvr security-advisories@github.com