CVE-2026-5466
wc_VerifyEccsiHash missing sanity check
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
1th
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.
| CWE | CWE-347 |
| Vendor | wolfssl |
| Product | wolfssl |
| Published | Apr 10, 2026 |
| Last Updated | Apr 10, 2026 |
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Affected Versions
wolfSSL / wolfSSL
0 < 5.9.1
Credits
Calif.io in collaboration with Claude and Anthropic Research