CVE-2026-34073: X.509: bypass of name constraints on wildcard SANs with matching peer names

X.509: bypass of name constraints on wildcard SANs with matching peer names

F-PYCA-CRYPTOGRAPHY-NAMECONSTRAINTS-WILDCARD-001

Public snapshot: 8 Oct 2026. Status, releases and attribution belong to each source below; none is inferred from another record.

Recorded evidence

—score not recorded

CVE-2026-34073CVEpyca/cryptography

X.509: bypass of name constraints on wildcard SANs with matching peer names

Fixed in: >= 46.0.6

patched

details

Finding IDs: F-PYCA-CRYPTOGRAPHY-NAMECONSTRAINTS-WILDCARD-001
CVE: CVE-2026-34073
GHSA: GHSA-m959-cc7f-wv43
Status: patched
Fixed in: >= 46.0.6
Recorded credit: Reporter: 1seal
Note: inferred mapping
CVE registry state: PUBLISHED
CVE state checked: 23 Sep 2026
Upstream title: X.509: bypass of name constraints on wildcard SANs with matching peer names
Upstream CWE: CWE-295
Upstream publication: 25 Mar 2026
Upstream updated: 25 Mar 2026
Metadata fetched: 23 Sep 2026
Upstream @1seal credit: @1seal: reporter (accepted)

F-PYCA-CRYPTOGRAPHY-NAMECONSTRAINTS-WILDCARD-001: Verification failures. Wildcard DNS names bypass certificate name constraints. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.

Mechanism source for F-PYCA-CRYPTOGRAPHY-NAMECONSTRAINTS-WILDCARD-001

Security area (1seal assessment): Identity. Wildcard DNS names bypass certificate name constraints. Reviewed 24 Sep 2026.

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How this page groups evidence

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