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CVE PROGRAM SOURCE RECORD4.8 Medium

CVE-2026-118767

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

randombit botan

  • >= 1.11.22, < 3.13.0affected

References