{"id":"CVE-2026-69248","title":"cryptography is a package designed to expose cryptographic primitives and recipes to Python developers","summary":"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 h…","severity":"high","cvss":7.4,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-295"],"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream (v. 10)","affected":["enterprise_linux 10","enterprise_linux_appstream_v_10","enterprise_linux_appstream_v_9","hardened_images"],"patched":["enterprise_linux_appstream_v_10","enterprise_linux_appstream_v_9","hardened_images"],"published":"2026-08-03","updated":"2026-09-10","sourceUpdated":"2026-09-10T20:36:14.340","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-69248","references":[{"url":"https://github.com/pyca/cryptography/commit/4d035a4225965edeffd312079a510ef25fcfdcb2","label":"security-advisories@github.com"},{"url":"https://github.com/pyca/cryptography/pull/14888","label":"security-advisories@github.com"},{"url":"https://github.com/pyca/cryptography/security/advisories/GHSA-m2h6-j472-rp4c","label":"security-advisories@github.com"},{"url":"https://github.com/pyca/cryptography/security/advisories/GHSA-m2h6-j472-rp4c","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-69248.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-69248"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2510830"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-69248"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-69248"},{"url":"https://access.redhat.com/errata/RHSA-2026:64795"},{"url":"https://access.redhat.com/errata/RHSA-2026:64774"},{"url":"https://access.redhat.com/errata/RHSA-2026:55543"},{"url":"https://github.com/advisories/GHSA-m2h6-j472-rp4c"},{"url":"https://github.com/pyca/cryptography/commit/286c89128"},{"url":"https://github.com/pyca/cryptography"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/cryptography/PYSEC-2026-3554.yaml"}],"tags":["nvd","csaf","vex","red-hat","ghsa","pip","osv"],"epss":0.00185,"epssPercentile":0.08317,"aliases":["GHSA-m2h6-j472-rp4c","PYSEC-2026-3554"],"ecosystem":"pip","cvssSource":"vendor","ingestedAt":"2026-08-03T21:30:01.382Z","slug":"CVE-2026-69248","body":"## Overview\n\ncryptography 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-69248)\n\nAffected packages:\n\n- `cryptography <= 48.0.0`\n\nPatched in:\n\n- `cryptography 49.0.0`\n\nSource: https://github.com/advisories/GHSA-m2h6-j472-rp4c\n\n## Vendor advisories\n\n- **RHSA-2026:64795** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10) · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:64795)\n- **RHSA-2026:64774** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:64774)\n- **RHSA-2026:55543** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-08-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:55543)\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-09-08 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-69248.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":40.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":5446,"id":"CVE-2026-69248","ts":1788887282727,"field":"cvss","old":null,"new":"7.4"},{"seq":5445,"id":"CVE-2026-69248","ts":1788887282727,"field":"severity","old":"medium","new":"high"},{"seq":4329,"id":"CVE-2026-69248","ts":1788886396448,"field":"cvss","old":"7.4","new":null},{"seq":4328,"id":"CVE-2026-69248","ts":1788886396448,"field":"severity","old":"high","new":"medium"},{"seq":3183,"id":"CVE-2026-69248","ts":1788883133345,"field":"cvss","old":null,"new":"7.4"},{"seq":3182,"id":"CVE-2026-69248","ts":1788883133345,"field":"severity","old":"medium","new":"high"}]}