CVE-2026-69249: python-cryptography is a package designed to expose cryptographic primitives and recipes to Python developers

This month

HIGH 8.7REMOTE

CVE-2026-69249 is a high-severity flaw (CVSS 8.7) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

python-cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In versions 42.0.0 through 48.0.0, when resolving invalid certificate chains that include duplicate copies of self-signed certificates, the processing recursively invokes the same candidate, leading to an exponential blowup. Although the limitation that the chain depth cannot exceed a specified maximum depth prevents unbounded recursion

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	8.7 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 84%)
CISA exploited list	No
Weakness	CWE-400
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: >= 42.0.0, < 49.0.0 · source

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

Fedora ELN · ntpd-rs · FIXED · 1.7.2-3.eln159 · FEDORA-2026-57e4a99310 · source

sudo dnf upgrade --advisory=FEDORA-2026-57e4a99310

Fedora 46 · moby-engine · FIXED · 29.9.2-2.fc46 · FEDORA-2026-4856be87b3 · source

sudo dnf upgrade --advisory=FEDORA-2026-4856be87b3

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 10 · python-cryptography · FIXED · python-cryptography-43.0.0-4.el10_2.5

sudo dnf upgrade --advisory=RHSA-2026:71658 rpm -q python-cryptography

RHEL 10.0 Extended Update Support · python-cryptography · FIXED · python-cryptography-43.0.0-4.el10_0.1

sudo dnf upgrade --advisory=RHSA-2026:71659 rpm -q python-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 7 · 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-2026-69249?

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

Is CVE-2026-69249 being exploited?

CVE-2026-69249 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-2026-69249 affect?

CVE-2026-69249 affects affected software. Severity is high (CVSS 8.7). python-cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In versions 42.0.0 through 48.0.0, when resolving invalid certificate chains that include duplicate copies of self-signed certifi

How urgent is CVE-2026-69249?

Priority 42/100. High severity; CISA SSVC: public proof of concept; Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities

References

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