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Critical Flaw in Fedora MinGW Python3 Exploited

Critical Flaw in Fedora MinGW Python3 Exploited

First seen 27 Sep 2026, 19:07 UTC • •
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ThreatCluster AI
ThreatCluster •September 27, 2026 at 19:57 UTC
  • •CVE-2026-7774 allows arbitrary file writes in Fedora's MinGW Python3.
  • •CISA confirms active exploitation of this vulnerability.
  • •Users must update to Python 3.11.16 to mitigate risks.

CISA has confirmed the exploitation of a critical flaw (CVE-2026-7774) affecting Fedora's MinGW Python3 package. This vulnerability allows arbitrary file writes via crafted link entries, posing a significant risk to users. The flaw was published on June 4, 2026, and affects multiple Fedora releases, including versions 43, 44, and 45. Users are urged to update to Python 3.11.16 to mitigate the risk. The updates were made available on September 18, 2026. The flaw has been confirmed to be actively exploited, necessitating immediate action from system administrators. The vulnerability impacts systems using the MinGW Python3 package on Linux. Administrators should check their systems for the affected versions and apply the necessary updates.

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Timeline

2026-06-04
CVE-2026-7774 published
A critical vulnerability in Fedora's MinGW Python3 package was disclosed, allowing arbitrary file writes.
Linuxsecurity
2026-09-18
Updates released for affected Fedora versions
Fedora released updates to address CVE-2026-7774, urging users to upgrade to Python 3.11.16.
Linuxsecurity
2026-09-27
CISA confirms exploitation
CISA confirmed that the vulnerability is being actively exploited in the wild, prompting immediate action.
Linuxsecurity

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