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CVE-2026-4786VulnerabilityPublished Updated

Red Hat Security Advisory: python3.12 security update

Affects Red Hat python3.12Source GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-4786· High 7.0

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

CVSS 4.0 base score
7.0High
How severe the flaw is on the 0–10 CVSS scale.
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:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 13 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
Python Software FoundationCPythonAffected
  • >=3.15.0a1 <3.15.0b1
Fixed in
  • 3.15.0b1
Python Software FoundationCPythonAffected
  • >=3.14.0a1 <3.14.5rc1
Fixed in
  • 3.14.5rc1
Python Software FoundationCPythonAffected
  • >=3.13.0 <3.13.14
Fixed in
  • 3.13.14
Python Software FoundationCPythonAffected
  • >=3.12.0 <3.12.14
Fixed in
  • 3.12.14
Python Software FoundationCPythonAffected
  • >=3.11.0 <3.11.16
Fixed in
  • 3.11.16
Python Software FoundationCPythonAffected
  • <3.10.21
Fixed in
  • 3.10.21

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 python3.12 packages that fix these vulnerabilities. Users should apply the security update for python3.12 as provided in Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions and other affected variants. Detailed update instructions are available at https://access.redhat.com/articles/11258. Applying these updates will remediate the vulnerabilities. No additional mitigation steps are indicated by the vendor advisory.

Description

A security update for python3.12 in Red Hat Enterprise Linux 9.4 addresses two vulnerabilities: a use-after-free in decompression modules (CVE-2026-6100) and a command injection in the webbrowser.open() API (CVE-2026-4786). Both vulnerabilities could lead to arbitrary code execution or information disclosure. Red Hat has released updated packages to fix these issues in multiple architectures and product variants. The update is rated as Important by Red Hat Product Security. No CVSS scores are provided in the advisory. No known exploits are reported in the wild at this time.

References

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