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CVE-2026-11310 is a high-severity certificate verification flaw in wolfSSL’s OpenSSL compatibility verifier, wolfSSL_X509_verify_cert(), exposed through X509_verify_cert(). In affected builds, the verifier temporarily loads caller-supplied untrusted intermediate certificates into the certificate manager during path construction, but fails to remove them before performing the trusted-store check. As a result, an untrusted intermediate can improperly serve as the trust anchor for the chain. An attacker can therefore supply a certificate chain that never reaches a configured trusted root yet is still accepted as valid. The issue affects only builds compiled with OPENSSL_EXTRA and applications that invoke X509_verify_cert() with caller-supplied untrusted intermediates. Native wolfSSL TLS/DTLS certificate verification is not affected. The flaw is applicable to certificate validation workflows beyond TLS, including S/MIME/CMS, code or firmware signing validation, and JWT/JWS x5c chain validation, and is not limited to any specific key type or cryptographic algorithm.
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11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A trust-chain bypass vulnerability in wolfSSL’s OpenSSL-compatible certificate verifier that can cause untrusted intermediate certificates to be accepted as valid.
An X.509 trust-chain bypass vulnerability in wolfSSL's OpenSSL compatibility certificate verifier (wolfSSL_X509_verify_cert()) that can allow acceptance of attacker-controlled certificates when applications validate certificates using caller-supplied untrusted intermediate certificates.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.