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CVE-2026-6091

MEDIUM CVSS: 6.5 Published: 2026-06-25 Modified: 2026-06-26

Description

Partial-chain certificate verification may accept chains that terminate at a peer-supplied, untrusted intermediate certificate rather than a trusted anchor. An attacker could present a chain that ends at an intermediate they control and have it accepted as valid. This affects the OpenSSL compatibility certificate-path-building path (wolfSSL_X509_verify_cert / X509_STORE, OPENSSL_EXTRA) when the X509_V_FLAG_PARTIAL_CHAIN verify flag is enabled.

Affected Platforms

Wolfssl Wolfssl

Weakness Type

CWE-295

References