Red Hat Security Advisory: python3 security update
Affects Red Hat python3Source GCVE Database
Not known to be exploited · CVSS 7.0 High · fixed in Red Hat package updates : patch Red Hat cpython soon.
Data as of 6 Nov 2026, 00:51 UTC
- Patch
- Available – fixed in 3.15.0a8, 3.14.4, 3.13.13 +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 20 Mar 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 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
|
| 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 python3 packages for Red Hat Enterprise Linux 8.4 Extended Life Cycle and AUS variants that address this vulnerability. Users should apply the official Red Hat security update RHSA-2026:9621 promptly to remediate the issue. Refer to Red Hat's article https://access.redhat.com/articles/11258 for update instructions. No additional mitigation steps are indicated beyond applying the official patch.
Description
A command-line option injection vulnerability exists in the Python webbrowser.open() function via crafted URLs. This issue affects Python as packaged in Red Hat Enterprise Linux 8.4 variants. The vulnerability could allow an attacker to inject command-line options, potentially leading to unintended command execution. Red Hat has issued a security update to address this vulnerability.