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High severity8.1NVD Advisory· Published Apr 10, 2026· Updated Apr 29, 2026

CVE-2026-5466

CVE-2026-5466

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

2
  • WolfSSL/Wolfssl2 versions
    cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*range: <5.9.1
    • (no CPE)

Patches

Vulnerability mechanics

References

1

News mentions

0

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