CVE-2026-5466

No fix known EPSS <1%CVSS 7.6

wolfSSL's ECCSI signature verifier `wc_VerifyEccsiHash` decodes the `r` and `s` scalars from the signature blob via `mp_read_unsigned_bin` with no check that they lie in `[1, q-1]`. A crafted forged signature could verify against any message for any identity, using only publicly-known constants.

Published 2026-04-10 · CVE record · OSV

Products: wolfssl

Distro releases