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UBUNTU-CVE-2026-27205

🗓️ 21 Feb 2026 06:17:00Reported by GoogleType 
osv
 osv🔗 osv.dev👁 4 Views

Flask versions 3.1.2 and earlier may expose session data via cached responses; fixed in 3.1.3.

Related
Refs
ReporterTitlePublishedViews
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IBM Security Bulletins		Security Bulletin: IBM Maximo Application Suite - IoT Component uses multiple third party dependencies which is vulnerable to multiple CVEs.
1 Apr 202607:22
–ibm
IBM Security Bulletins		Security Bulletin:Flask Vary Cookie Header Vulnerability: Use of Cache Containing Sensitive Information Fixed in 3.1.3
4 May 202612:50
–ibm
IBM Security Bulletins		Security Bulletin: IBM Maximo Application Suite uses flask-3.1.2-py3-none-any.whl which is vulnerable to CVE-2026-27205.
6 Apr 202618:34
–ibm
IBM Security Bulletins		Security Bulletin: IBM Watson Speech Services Cartridge is vulnerable to a Use of Cache Containing Sensitive Information in Flask [CVE-2026-27205]
18 Jun 202618:31
–ibm
IBM Security Bulletins		Security Bulletin: Investigation Assistant App for IBM QRadar SIEM is vulnerable to using components with known vulnerabilities
6 Apr 202617:16
–ibm
IBM Security Bulletins		Security Bulletin: Location Service for ESRI Component uses cryptography-46.0.3, flask-3.1.2 and werkzeug-3.1.5 library which were vulnerable to CVE-2026-26007, CVE-2026-27205 and CVE-2026-27199 respectively
30 Mar 202615:08
–ibm
IBM Security Bulletins		Security Bulletin: IBM Cloud Pak for Data System (CPDS 1.0) is affected by a sensitive information caching vulnerability due to Flask
8 Jul 202610:14
–ibm
IBM Security Bulletins		Security Bulletin: IBM Watson Discovery Cartridge affected by vulnerability in flask-3.1.2-py3-none-any.whl
1 Jun 202617:08
–ibm
IBM Security Bulletins		Security Bulletin: Multiple security vulnerabilities are addressed with IBM Process Mining 2.1.1
31 Mar 202616:18
–ibm
IBM Security Bulletins		Security Bulletin: Maximo AI Service uses qs-6.14.1.tgz and flask-3.0.3-py3-none-any.whl which is vulnerable to CVE-2026-2391 and CVE-2026-27205.
6 Apr 202613:58
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19 Mar 2026 08:32Current
5.8Medium risk
Vulners AI Score5.8
CVSS 42.3
CVSS 3.14.3
EPSS0.00374
Flask frameworksession exposurecached responsessecurity flaw
4