Linuxsecurity Flask Vulnerability Exposes Sensitive Information in Ubuntu Releases
Article Content
- •CVE-2026-27205 affects multiple Ubuntu LTS releases due to Flask vulnerability.
- •Flask's failure to mark web responses as user-specific could lead to sensitive data exposure.
- •Users should update to the latest python3-flask versions to mitigate the vulnerability.
A security vulnerability identified as CVE-2026-27205 affects Flask, a micro web framework used in Ubuntu 24.04 LTS, 22.04 LTS, and 20.04 LTS. Discovered by Shourya Jaiswal, the issue arises from Flask's failure to mark certain web responses as user-specific, potentially allowing remote attackers to access sensitive information over the network. The affected versions include python3-flask 3.0.2-1ubuntu1.1 for Ubuntu 24.04 LTS, python3-flask 2.0.1-2ubuntu1.2 for Ubuntu 22.04 LTS, and python3-flask 1.1.1-2ubuntu0.1+esm1 for Ubuntu 20.04 LTS. Users are advised to perform a standard system update to mitigate the risk. The vulnerability was published on February 21, 2026, and has been addressed with available patches. The issue highlights the importance of timely updates to prevent potential data exposure.
Ask AI about this cluster
Answers cite the sources they use
Timeline
More articles in this cluster (2)
Following this threat?
Track Ubuntu and CVE-2026-27205 in your own feed — you're alerted when they show up in new reporting, leak sites or exploitation.
Free account · no card needed
Continue Reading
CVE-2015-3306 Exploited in ProFTPD FTP Servers CVE-2015-3306, a vulnerability in ProFTPD 1.3.5, allows remote attackers to read and write arbitrary files using the SITE CPFR and SITE CPTO commands. This exploit can lead to unauthorized access and potential remote code execution, as the commands are executed with the privileges of the ProFTPD service. Active… 
CISA Mandates Urgent Patching of Five Critical Flaws Exploited by Flax Typhoon The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has ordered federal agencies to patch five critical vulnerabilities by October 11, 2026, following exploitation by the China-linked hacking group Flax Typhoon. The vulnerabilities, added to CISA's Known Exploited Vulnerabilities (KEV) catalog, include…