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4.8 Medium

CVE-2026-118767 Botan is a C++ cryptography library

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.

Affected products and versions

Product Affected versions Fixed in
Botan 1.11 1.11.22 → < 3.13.0 3.13.0

Other CVEs of Botan

The 15 CVEs of Botan →
CVE-2026-118769 Botan is a C++ cryptography library 9.2 Critical CVE-2026-118768 Botan is a C++ cryptography library 5.9 Medium CVE-2026-118766 Botan: Online OCSP redirects enable blind requests to internal HTTP services 6.1 Medium CVE-2026-118765 Botan is a C++ cryptography library 7.3 High
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