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7.5
Python cryptography library can be fooled by fake certificates
published 1 month ago
Summary
The cryptography package that comes with Python 3.14 has two weaknesses. First, it can be tricked into accepting fake security certificates, which could let attackers pretend to be trusted sites or services. Second, it can spend an excessive amount of time processing certain certificate chains, which may slow down or crash applications. Install the updated package as soon as possible to fix these problems.
What to do
- Update rocky python3.14-cryptography to version 0:45.0.4-4.el9_8.6.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Rocky Linux:9 | rocky | python3.14-cryptography |
< 0:45.0.4-4.el9_8.6 Fix: upgrade to 0:45.0.4-4.el9_8.6
|
Original advisory text
Important: python3.14-cryptography security update
Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.
Security Fix(es):
* python-cryptography: python-cryptography: Duplicate self-signed intermediates can cause exponential path-building (CVE-2026-69249)
* python-cryptography: python-cryptography: python-cryptography verifier accepts wildcard DNS names allowing escape from permittedSubtrees (CVE-2026-69248)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Security Fix(es):
* python-cryptography: python-cryptography: Duplicate self-signed intermediates can cause exponential path-building (CVE-2026-69249)
* python-cryptography: python-cryptography: python-cryptography verifier accepts wildcard DNS names allowing escape from permittedSubtrees (CVE-2026-69248)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
References
- https://errata.rockylinux.org/RLSA-2026:64774 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2510815 Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2510830 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:64774 Vendor Advisory
Internet-facing
14 days
Internal
60 days
- Not known to be exploited
- Can be exploited automatically (estimated)
- Gives an attacker partial control (estimated)
Timeline
Published9 Sep 2026
Updated9 Sep 2026
First seen9 Sep 2026
Sources
RLSA-2026:64774 · OSV
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