VULNERABILITY INTELLIGENCE

CVE-2026-32877

CVSS score8.2 HIGH
EPSS probability0.29%
CISA KEVNot currently listed
Published2026-03-30
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

Description

Botan is a C++ cryptography library. From version 2.3.0 to before version 3.11.0, during SM2 decryption, the code that checked the authentication code value (C3) failed to check that the encoded value was of the expected length prior to comparison. An invalid ciphertext can cause a heap over-read of up to 31 bytes, resulting in a crash or potentially other undefined behavior. This issue has been patched in version 3.11.0.

Weakness classification

  • security-advisories@github.com: CWE-125

Primary references