{"cve":"CVE-2026-69248","nvd":{"published":"2026-08-03T22:16:52.550","modified":"2026-10-23T21:10:00.157","status":"Awaiting Analysis","description":"cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In versions 45.0.0 through 48.0.0, if an intermediate constrained CA permits the DNS name foo.example.com, and the leaf certificate has a wildcard in its DNS SAN of *.example.com, python-cryptography's verifier accepts which allows escaping outside of the permitted names. The core issue is in DNSConstraint::matches, where a wildcard pattern was treated as matching a more-specific permitted constraint even though *.example.com can expand to sibling names such as bar.example.com outside foo.example.com. This allows acceptance of an invalid certificate chain. This issue is fixed in 49.0.0.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:P","score":6.9},"cvss_v3":null,"cwes":["CWE-295"],"references":["https://github.com/pyca/cryptography/commit/4d035a4225965edeffd312079a510ef25fcfdcb2","https://github.com/pyca/cryptography/pull/14888","https://github.com/pyca/cryptography/security/advisories/GHSA-m2h6-j472-rp4c","https://github.com/pyca/cryptography/security/advisories/GHSA-m2h6-j472-rp4c"],"products":[],"source":"nvd","synced_at":"2026-10-24T16:53:34.184483516+00:00"},"epss":{"cve":"CVE-2026-69248","score":0.00244,"percentile":0.15403,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-m2h6-j472-rp4c","url":"https://osv.dev/vulnerability/GHSA-m2h6-j472-rp4c","summary":"python-cryptography verifier accepts wildcard DNS names allowing escape from permittedSubtrees","modified":"2026-09-24T15:00:04.719975807Z","packages":[{"ecosystem":"PyPI","name":"cryptography","purl":"pkg:pypi/cryptography","ranges":[">=45.0.0 <49.0.0"],"fixed":["49.0.0"]}]},{"id":"PYSEC-2026-3554","url":"https://osv.dev/vulnerability/PYSEC-2026-3554","summary":"python-cryptography verifier accepts wildcard DNS names allowing escape from permittedSubtrees","modified":"2026-08-04T14:30:26.230323446Z","packages":[{"ecosystem":"PyPI","name":"cryptography","purl":"pkg:pypi/cryptography","ranges":["<49.0.0"],"fixed":["49.0.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}