CVE-2026-5263CWE-295

URI nameConstraints not enforced in ConfirmNameConstraints()

High · published April 9, 2026

CVSS v4.0
7.0
EPSS
0%
Percentile
15.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
7.0 · HIGH
Vector
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
EPSS
0.00252 · 15.8th percentile
Weakness
CWE-295 · Improper Certificate Validation
Published
2026-04-09T21:15Z
EPSS history
Timeline
  • 09 APR 21:15Z
    URI nameConstraints not enforced in ConfirmNameConstraints()
    cvelistv5