CVE-2026-5194 | THREATINT

Description

Missing hash/digest size and OID checks allow digests smaller than allowed when verifying ECDSA certificates, or smaller than is appropriate for the relevant key type, to be accepted by signature verification functions. This could lead to reduced security of ECDSA certificate-based authentication if the public CA key used is also known. This affects ECDSA/ECC verification when EdDSA or ML-DSA is also enabled.

PUBLISHED Reserved 2026-03-30 | Published 2026-04-09 | Updated 2026-05-23 | Assigner wolfSSL

CRITICAL: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:L/SA:L/U:Red

Problem types

CWE-295 Improper Certificate Validation

Product status

Default status

unaffected

3.12.0 (semver) before 5.9.1

affected

Credits

Nicholas Carlini from Anthropic finder

References

www.anthropic.com/research/glasswing-initial-update

github.com/wolfSSL/wolfssl/pull/10131 patch

cve.org (CVE-2026-5194)

nvd.nist.gov (CVE-2026-5194)

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