CVE-2026-69248
Reported by GitHub_M · Published August 3, 2026
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.
Risk Scores
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| pyca | cryptography | < 49.0.0 |
| wolfi | az | 0 |
| chainguard | dbt-snowflake | 0, 0 |
| chainguard | openstack-glance-2025.1 | 0, 0, 0 |
| wolfi | mlflow | 0, 0, 0 |
| chainguard | datadog-agent-fips-7.77 | 0, 0 |
| chainguard | vllm-openai-cuda-12.9 | 0, 0, 0 |
| chainguard | openstack-nova-2026.1 | 0, 0, 0 |
| wolfi | kserve | 0, 0, 0 |
| chainguard | openstack-nova-2025.1 | 0, 0, 0 |
| chainguard | apache-beam-python-3.12-sdk | 0, 0, 0 |
| chainguard | apache-beam-python-3.13-sdk | 0, 0, 0 |
| pyca | cryptography | < 49.0.0, < 49.0.0, < 49.0.0 |
| chainguard | openstack-nova-2025.2 | 0, 0, 0 |
| chainguard | apache-beam-python-3.11-sdk | 0, 0, 0 |
| chainguard | openstack-glance-2026.1 | 0, 0, 0 |
| chainguard | openstack-glance-2025.2 | 0, 0, 0 |
| PyPI | cryptography | 45.0.0, 45.0.0, 0 |
| chainguard | mlflow | 0, 0, 0 |
| chainguard | vllm-openai-cuda-13.0 | 0 |
…and 1 more
Timeline
- Aug 3, 2026 CVE Published
- Aug 4, 2026 Coalition ESS Score
- Aug 4, 2026 Security Advisory
- Aug 7, 2026 EPSS Score
- Aug 24, 2026 EPSS Score
- Sep 9, 2026 EPSS Score
- Sep 16, 2026 EPSS Score
- Sep 16, 2026 CVE Updated
- Sep 16, 2026 Distribution Patch
- Sep 16, 2026 Distribution Patch
- Sep 24, 2026 EPSS Score
- Sep 26, 2026 EPSS Score
References
- https://github.com/pyca/cryptography/security/advisories/GHSA-m2h6-j472-rp4c x_refsource_CONFIRM
- https://github.com/pyca/cryptography/pull/14888 x_refsource_MISC
- https://github.com/pyca/cryptography/commit/4d035a4225965edeffd312079a510ef25fcfdcb2 x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-69248 advisory
- https://github.com/advisories/GHSA-m2h6-j472-rp4c advisory
- https://github.com/pyca/cryptography/commit/286c89128 patch
- https://github.com/pypa/advisory-database/tree/main/vulns/cryptography/PYSEC-2026-3554.yaml advisory