CVE-2026-5263 (GCVE-0-2026-5263)

Vulnerability from cvelistv5 – Published: 2026-04-09 21:15 – Updated: 2026-04-10 18:09
VLAI?
Title
URI nameConstraints not enforced in ConfirmNameConstraints()
Summary
URI nameConstraints from constrained intermediate CAs are parsed but not enforced during certificate chain verification in wolfcrypt/src/asn.c. A compromised or malicious sub-CA could issue leaf certificates with URI SAN entries that violate the nameConstraints of the issuing CA, and wolfSSL would accept them as valid.
Severity ?
7 (High)
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:L/VA:N/SC:H/SI:N/SA:N
CWE
  • CWE-295 - Improper Certificate Validation
Assigner
References
Impacted products
Vendor Product Version
wolfSSL wolfSSL Affected: 0 , < 5.9.1 (semver)
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Credits
Oleh Konko @1seal
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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