CVE-2026-5466
wc_VerifyEccsiHash missing sanity check
Summary
wc_VerifyEccsiHash missing sanity check
Original description
The description as published by the source.
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.
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-5466 wolfssl
- Ubuntu UBUNTU-CVE-2026-5466 wolfssl
References
- advisory github.com
- advisory nvd.nist.gov
- patch github.com