---
id: CVE-2026-69248
title: >-
  cryptography is a package designed to expose cryptographic primitives and
  recipes to Python developers
summary: >-
  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 h…
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-295
vendor: Red Hat
product: Red Hat Enterprise Linux AppStream (v. 10)
affected:
  - enterprise_linux 10
  - enterprise_linux_appstream_v_10
  - enterprise_linux_appstream_v_9
  - hardened_images
patched:
  - enterprise_linux_appstream_v_10
  - enterprise_linux_appstream_v_9
  - hardened_images
published: '2026-08-03'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T20:36:14.340'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-69248'
references:
  - url: >-
      https://github.com/pyca/cryptography/commit/4d035a4225965edeffd312079a510ef25fcfdcb2
    label: security-advisories@github.com
  - url: 'https://github.com/pyca/cryptography/pull/14888'
    label: security-advisories@github.com
  - url: >-
      https://github.com/pyca/cryptography/security/advisories/GHSA-m2h6-j472-rp4c
    label: security-advisories@github.com
  - url: >-
      https://github.com/pyca/cryptography/security/advisories/GHSA-m2h6-j472-rp4c
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-69248.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-69248'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2510830'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-69248'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-69248'
  - url: 'https://access.redhat.com/errata/RHSA-2026:64795'
  - url: 'https://access.redhat.com/errata/RHSA-2026:64774'
  - url: 'https://access.redhat.com/errata/RHSA-2026:55543'
  - url: 'https://github.com/advisories/GHSA-m2h6-j472-rp4c'
  - url: 'https://github.com/pyca/cryptography/commit/286c89128'
  - url: 'https://github.com/pyca/cryptography'
  - url: >-
      https://github.com/pypa/advisory-database/tree/main/vulns/cryptography/PYSEC-2026-3554.yaml
  - url: 'https://access.redhat.com/errata/RHSA-2026:70965'
  - url: 'https://access.redhat.com/errata/RHSA-2026:70979'
  - url: 'https://access.redhat.com/errata/RHSA-2026:70995'
  - url: 'https://access.redhat.com/errata/RHSA-2026:70969'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
  - ghsa
  - pip
  - osv
epss: 0.00185
epssPercentile: 0.08334
aliases:
  - GHSA-m2h6-j472-rp4c
  - PYSEC-2026-3554
ecosystem: pip
cvssSource: vendor
ingestedAt: '2026-08-03T21:30:01.382Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-69248)

Affected packages:

- `cryptography <= 48.0.0`

Patched in:

- `cryptography 49.0.0`

Source: https://github.com/advisories/GHSA-m2h6-j472-rp4c

## Vendor advisories

- **RHSA-2026:64795** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10) · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:64795)
- **RHSA-2026:64774** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:64774)
- **RHSA-2026:55543** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-08-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:55543)
- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-09-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-69248.json)
- **RHSA-2026:70965** · Red Hat · fixed in: Red Hat AI Inference Server 3.4 · released 2026-09-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:70965)
- **RHSA-2026:70979** · Red Hat · fixed in: Red Hat AI Inference Server 3.4 · released 2026-09-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:70979)
- **RHSA-2026:70995** · Red Hat · fixed in: Red Hat AI Inference Server 3.4 · released 2026-09-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:70995)
- **RHSA-2026:70969** · Red Hat · fixed in: Red Hat AI Inference Server 3.4 · released 2026-09-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:70969)