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.
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Thu, 25 Jun 2026 18:30:00 +0000
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ssvc
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Thu, 25 Jun 2026 17:30:00 +0000
| Type | Values Removed | Values Added |
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| 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. | |
| Title | Partial-chain verification accepts untrusted intermediate as trust anchor | |
| Weaknesses | CWE-295 | |
| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: wolfSSL
Published:
Updated: 2026-06-25T17:58:31.045Z
Reserved: 2026-04-10T16:01:23.181Z
Link: CVE-2026-6091
Updated: 2026-06-25T17:58:27.399Z
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