CVE-2026-5466 — wc_VerifyEccsiHash missing sanity check
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-…
Published: 2026-04-10 · CVSS: 7.6 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7