CVE-2026-32877HIGH 8.2EPSS p19.4%

CVE-2026-32877CVE-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.

Scoring

CVSS 3.18.2 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
EPSS0.28% probability of exploitation · percentile 19.4% · 2026-06-18T12:00:27Z
Published2026-03-30
Last modified2026-04-13

Underlying weaknesses· 1

CWE-125

References

  1. https://github.com/randombit/botan/security/advisories/GHSA-7jj6-4r42-w9h6

1

TypeTargetConfidenceTier
WeaknessOut-of-bounds Readcwe-1250%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.