CVE-2026-5263

7.0 highEPSS 0.2%

High (7.0) in wolfssl wolfssl. EPSS 0.2% chance of exploitation in the next 30 days.

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

CVSS 4.0

7.0 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

CVSS 3.1

6.5 medium

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 7% of CVEs (scores of 2026-10-31)
CWE: CWE-295
Published: 2026-04-09
Modified: 2026-07-02
Record from: the NVD, synced 2026-10-19

Affected

wolfssl:wolfssl

References

https://github.com/wolfSSL/wolfssl/pull/10048
https://www.talosintelligence.com/vulnerability_reports/TALOS-2026-2410

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