Medium 6.9Published Aug 3, 2026

CVE-2026-69248python-cryptography verifier accepts wildcard DNS names allowing escape from permittedSubtrees

Updated under an hour ago (Oct 26, 2026, 8:00 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for pyca cryptography

Exploited in the last 30 days

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: 6.9 MEDIUM (v4.0, CNA)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
Weakness (CWE): CWE-295
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Sep 2, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

pyca cryptography pyca:cryptography (from the name)	before 49.0.0	CNA record

References

https://github.com/pyca/cryptography/security/advisories/GHSA-m2h6-j472-rp4cx-refsource-confirm
https://github.com/pyca/cryptography/pull/14888x-refsource-misc
https://github.com/pyca/cryptography/commit/4d035a4225965edeffd312079a510ef25fcfdcb2x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.