6.9
Medium
CVE-2026-69248 cryptography is a package designed to expose cryptographic primitives and recipes to Python developers
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| cryptography 49.0 | earliest → < 49.0.0 | 49.0.0 |
References
- github.com github.com
- github.com github.com
- github.com github.com
Timeline
- Published
- Last modified
Other CVEs of cryptography
The 9 CVEs of cryptography →
CVE-2026-69249
python-cryptography is a package designed to expose cryptographic primitives and recipes to Python developers
8.7
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CVE-2026-69247
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers
8.2
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CVE-2026-39892
cryptography has a buffer overflow if non-contiguous buffers were passed to APIs
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CVE-2026-34073
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers
1.7
Low