CVE-2026-118769

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/randombit/botan/commit/c6089ab7fab616517d56c447c93e13a5c57a0af3
https://github.com/randombit/botan/pull/5805
https://github.com/randombit/botan/security/advisories/GHSA-c68p-822g-jfvr

Configurations

No configuration.

History

29 Oct 2026, 18:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-29 18:17

Updated : 2026-10-30 19:37

NVD link : CVE-2026-118769

Mitre link : CVE-2026-118769

CVE.ORG link : CVE-2026-118769

JSON object : View

Products Affected

No product.

CWE

CWE-125

Out-of-bounds Read

CWE-681

Incorrect Conversion between Numeric Types

CWE-787

Out-of-bounds Write

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