Red Hat Security Advisory: python3 security update
Affects Red Hat python3Source GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 7.0 High · fixed in Red Hat package updates : patch Red Hat cpython soon.
Data as of 30 Oct 2026, 06:59 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 21% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 3.15.0b1, 3.14.5rc1, 3.13.14 +3
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 13 Apr 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 29 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Python Software FoundationCPython | Affected
| Fixed in
|
| Python Software FoundationCPython | Affected
| Fixed in
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| Python Software FoundationCPython | Affected
| Fixed in
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| Python Software FoundationCPython | Affected
| Fixed in
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| Python Software FoundationCPython | Affected
| Fixed in
|
| Python Software FoundationCPython | Affected
| Fixed in
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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 Python 3 packages for Red Hat Enterprise Linux 8.8 to address these vulnerabilities. Users should apply the provided security updates as described in the Red Hat advisory RHSA-2026:19549 and the referenced article https://access.redhat.com/articles/11258. No alternative mitigations are specified; applying the official update is the recommended remediation.
Description
A security advisory from Red Hat addresses two vulnerabilities in Python 3 affecting Red Hat Enterprise Linux 8.8 variants. The first vulnerability (CVE-2026-6100) involves arbitrary code execution or information disclosure via a use-after-free flaw in decompression modules. The second vulnerability (CVE-2026-4786) allows arbitrary code execution through command injection in the webbrowser.open() API. Red Hat has released updates to mitigate these issues in the affected Python packages.
References
- access.redhat.com/errata/RHSA-2026:19549 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2457932 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2458049 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_19549.json (opens in a new tab)