CVE-2026-69248

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Source
https://cve.org/CVERecord?id=CVE-2026-69248
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-69248.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-69248
Aliases
Downstream
Related
Published
2026-08-03T21:21:43.710Z
Modified
2026-08-05T08:56:56.533337282Z
Severity
  • 6.9 (Medium) CVSS_V4 - 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 CVSS Calculator
Summary
python-cryptography verifier accepts wildcard DNS names allowing escape from permittedSubtrees
Details

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Prior to 49.0.0, 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.

Database specific 
{
    "cwe_ids": [
        "CWE-295"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/69xxx/CVE-2026-69248.json"
}
References

Affected packages

Git / github.com/pyca/cryptography

Affected ranges

Type
GIT
Repo
https://github.com/pyca/cryptography
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
4d035a4225965edeffd312079a510ef25fcfdcb2
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "49.0.0"
        }
    ]
}

Affected versions

0.*
0.1
0.2
0.3
0.4
0.5
0.5.1
0.6
0.7
0.8
0.9
1.*
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.*
2.0
2.1
2.2
2.3
2.4
2.4.1
2.5
2.6
2.6.1
2.7
2.8
2.9
3.*
3.0
3.1
3.2
3.3
3.4
35.*
35.0.0
36.*
36.0.0
37.*
37.0.0
38.*
38.0.0
39.*
39.0.0
40.*
40.0.0
41.*
41.0.0
42.*
42.0.0
43.*
43.0.0
44.*
44.0.0
45.*
45.0.0
46.*
46.0.0
46.0.1
47.*
47.0.0
48.*
48.0.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-69248.json"