CVE-2026-69248: cryptography is a package designed to expose cryptographic primitives and recipes to Python developers

Routine

MEDIUM 6.9REMOTE

CVE-2026-69248 is a medium-severity flaw (CVSS 6.9) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

CISA SSVC: public proof of concept
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	6.9 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 85%)
CISA exploited list	No
Weakness	CWE-295
Published	2026-08-03
Last modified	2026-10-23

Publisher (CNA): GitHub, Inc.

Last updated 2026-10-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-08-03 22:16 UTCPublished CVE record published
2026-10-23 21:10 UTCUpdated Record last modified

Exact fixes by distribution

Python (pip) · cryptography · FIXED · 49.0.0 · vulnerable: >= 45.0.0, < 49.0.0 · source

pip install --upgrade "cryptography>=49.0.0" pip show cryptography

Fedora 46 · sugar-clock · FIXED · 22.1-17.fc46 · FEDORA-2026-57948849df · source

sudo dnf upgrade --advisory=FEDORA-2026-57948849df

Fedora ELN · selinux-policy · FIXED · 45.23-1.eln159 · FEDORA-2026-3668c969a2 · source

sudo dnf upgrade --advisory=FEDORA-2026-3668c969a2

Ubuntu 20.04 · python-cryptography · NOT AFFECTED

Ubuntu 22.04 · python-cryptography · NOT AFFECTED

Ubuntu 24.04 · python-cryptography · NOT AFFECTED

Debian 12 · python-cryptography · NO FIX YET

Debian 13 · python-cryptography · NO FIX YET

RHEL 10 · python3.14-cryptography · FIXED · python3.14-cryptography-45.0.4-4.el10_2.5

sudo dnf upgrade --advisory=RHSA-2026:64795 rpm -q python3.14-cryptography

RHEL 9 · python3.14-cryptography · FIXED · python3.14-cryptography-45.0.4-4.el9_8.6

sudo dnf upgrade --advisory=RHSA-2026:64774 rpm -q python3.14-cryptography

RHEL 10 · python-cryptography · NO FIX YET

RHEL 7 · python-cryptography · NOT AFFECTED

RHEL 8 · python-cryptography · NOT AFFECTED

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-69248?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-69248 being exploited?

CVE-2026-69248 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-69248 affect?

CVE-2026-69248 affects affected software. Severity is medium (CVSS 6.9). 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

How urgent is CVE-2026-69248?

Priority 36/100. CISA SSVC: public proof of concept; Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities

References

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