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Generated remediation guidance and an executive summary. No account required.
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.
Use CWE-125, Botan Project vendor hub and Botan product page to widen CVE-2026-32877 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2021-24115, CVE-2026-34580 and CVE-2022-43705 for nearby disclosures in the same product family.