Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Affects Red HatSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 5.9 Medium · fixed in Red Hat package updates : update Red Hat CPython when convenient.
Data as of 5 Nov 2026, 18:20 UTC
- Patch
- Available – fixed in 3.15.0a6, 3.14.7, 3.13.15
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 20 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.
What to do
Upgrade CPython to 3.15.0a6, 3.14.7 or 3.13.15.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Python Software FoundationCPython | Affected
| Fixed in
|
| Python Software FoundationCPython | Affected
| Fixed in
|
| Python Software FoundationCPython | Affected
| Fixed in
|
GitHubCPythonpkg:github/CPythonOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Red Hat has released updated python3.14 RPM packages as part of the Hardened Images update to address these vulnerabilities. Applying this update is the recommended remediation. No effective mitigations are currently available that meet Red Hat's criteria for ease of use and deployment. Users should apply the provided updates from Red Hat to remediate the vulnerabilities. For detailed update instructions, refer to https://images.redhat.com/ and the Red Hat advisory RHSA-2026:9228.
Description
A security advisory from Red Hat addresses multiple vulnerabilities in Red Hat Hardened Images RPMs, including a critical flaw in the Python webbrowser.open() API (CVE-2026-4786). This flaw allows command injection via specially crafted URLs containing "%action", bypassing previous mitigations and potentially enabling arbitrary code execution. The advisory includes updates to various python3.14 RPM packages to address these issues.
References
- access.redhat.com/errata/RHSA-2026:9228 (opens in a new tab)
- images.redhat.com (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-4786 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-5713 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-6100 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-1502 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2025-15366 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_9228.json (opens in a new tab)