๐Ÿ›ก๏ธ CVE-2026-5466
๐ŸŸ  CVSS 8.1 โ€” High โœ… No Known Exploit CWE-347 NVD
8.1
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity HIGH
CVSS Score 8.1
CVSS Vector CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE CWE-347
Public Exploit โœ… No
Source NVD
Published 2026-04-10
Updated 2026-06-02
Modified 2026-04-29
Fix URL N/A

Affected Packages

Software From version Fixed in
wolfssl โ€” 5.9.1

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