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8.1
rocky/python3.14 can be tricked into trusting false certificates
published 26 days ago
Summary
The Python 3.14 interpreter provided by Rocky Linux may fail to properly check the server name when establishing secure connections, allowing attackers to present fake certificates. It can also crash or be taken over if a special callback changes the security context during a connection. Update Python to the latest version as soon as possible to restore proper certificate checks and stop the crash risk.
What to do
- Update rocky python3.14 to version 0:3.14.8-1.el10_2.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Rocky Linux:10 | rocky | python3.14 |
< 0:3.14.8-1.el10_2 Fix: upgrade to 0:3.14.8-1.el10_2
|
Original advisory text
Important: python3.14 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: python: Certificate verification bypass via missing server_hostname validation in SSLContext.wrap_bio() (CVE-2026-19553)
* python: Use-after-free of a server-side SSLContext when sni_callback switches contexts (CVE-2026-19445)
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: python: Certificate verification bypass via missing server_hostname validation in SSLContext.wrap_bio() (CVE-2026-19553)
* python: Use-after-free of a server-side SSLContext when sni_callback switches contexts (CVE-2026-19445)
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-2026:77018 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2544127 Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2544138 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:77018 Vendor Advisory
Internet-facing
3 days
Internal
60 days
- Not known to be exploited
- Can be exploited automatically (estimated)
- Gives an attacker full control (estimated)
Timeline
Published9 Oct 2026
Updated9 Oct 2026
First seen9 Oct 2026
Sources
RLSA-2026:77018 · OSV
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