#VU125927 Improper Verification of Cryptographic Signature in wolfSSL - CVE-2026-5466
Published: April 14, 2026
Vulnerability identifier: #VU125927
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-5466
CWE-ID: CWE-347
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
wolfSSL
wolfSSL
Software vendor:
wolfSSL
wolfSSL
Description
The vulnerability allows a remote attacker to forge signatures.
The vulnerability exists due to improper cryptographic signature verification in wc_VerifyEccsiHash when decoding the r and s scalars from the signature blob. A remote attacker can provide a crafted forged signature to forge signatures.
The verifier does not check that the decoded scalars lie in the range [1, q-1].
Remediation
Install security update from vendor's website.