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CVE-2026-5194 is a critical improper certificate-validation vulnerability in wolfSSL signature verification. Missing hash/digest-size and algorithm OID validation permit signature verification functions to accept digests shorter than FIPS 186-4 or FIPS 186-5 permits, or shorter than is appropriate for the relevant public-key type. The issue affects ECDSA/ECC certificate verification when EdDSA or ML-DSA support is also enabled; reporting also identifies affected signature paths involving DSA, ML-DSA, Ed25519, and Ed448.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
39 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical wolfSSL certificate-signature verification flaw involving missing hash, digest-size, and object-identifier checks. It is background context and is not part of the ML-KEM key-recovery issue.
A wolfCrypt cryptographic validation flaw caused by missing digest size and OID validation in several signature algorithms, reducing the security of certificate-based authentication.
A vulnerability in the wolfSSL cryptographic library that could have allowed attackers to create fake certificates and host spoofed sites for targets such as email providers or banks.
A critical certificate forgery vulnerability in the wolfSSL open-source security library that could allow attackers to forge digital identities and enable convincing fake websites.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.