CVE-2026-32877

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.

PUBLISHED Reserved 2026-03-16 | Published 2026-03-30 | Updated 2026-03-31 | Assigner GitHub_M

Problem types

CWE-125: Out-of-bounds Read

Product status

References

github.com/.../botan/security/advisories/GHSA-7jj6-4r42-w9h6

cve.org (CVE-2026-32877)

nvd.nist.gov (CVE-2026-32877)

Download JSON