URI nameConstraints not enforced in ConfirmNameConstraints()_CVE-2026-5263

7 / 10

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

Description

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.

Basic Information

ID CVE-2026-5263

Source wolfSSL

Published Apr 9, 2026 at 21:15

Modified Apr 10, 2026 at 18:09

Affected Product

Vendor wolfSSL

Product wolfSSL

Affected Versions wolfSSL wolfSSL 0

CWE Classification

CWE-295

References

github.com /wolfSSL/wolfssl/pull/10048

{
    "lastseen": "",
    "description": "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.",
    "published": "2026-04-09T21:15:48.148Z",
    "modified": "2026-04-10T18:09:12.862Z",
    "type": "cve",
    "title": "URI nameConstraints not enforced in ConfirmNameConstraints()",
    "source": "wolfSSL",
    "references": "https://github.com/wolfSSL/wolfssl/pull/10048",
    "id": "CVE-2026-5263",
    "bulletinFamily": "",
    "cwe": [
        "CWE-295"
    ],
    "cvelist": null,
    "sourceData": "wolfSSL wolfSSL 0",
    "sourceHref": "",
    "cvss": {
        "score": 7,
        "severity": "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",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "wolfSSL",
    "version": "0",
    "vendor": "wolfSSL",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}