CVE-2026-69248High· 7.4▾ Twilightcryptography 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…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 40.7 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 4.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
— → 7.4
medium → high
7.4 → —
high → medium
— → 7.4
medium → high
Last analysed / modified upstream
0.2% → 0.3%
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
cryptography <= 48.0.0Patched in:
cryptography 49.0.0Source: https://github.com/advisories/GHSA-m2h6-j472-rp4c
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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