Bug 2353720 (CVE-2024-6839)

Summary: CVE-2024-6839 flask-cors: Improper Regex Path Matching in corydolphin/flask-cors
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: adudiak, bdettelb, doconnor, kaycoth, kgaikwad, kshier, omaciel, stcannon, teagle, yguenane
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found inflask-cors. This vulnerability allows unauthorized cross-origin access to sensitive data or functionality via improper regex path matching, prioritizing longer patterns over more specific ones. This issue leads to less restrictive CORS policies being applied to sensitive endpoints.
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Description OSIDB Bzimport 2025-03-20 11:08:16 UTC 
corydolphin/flask-cors version 4.0.1 contains an improper regex path matching vulnerability. The plugin prioritizes longer regex patterns over more specific ones when matching paths, which can lead to less restrictive CORS policies being applied to sensitive endpoints. This mismatch in regex pattern priority allows unauthorized cross-origin access to sensitive data or functionality, potentially exposing confidential information and increasing the risk of unauthorized actions by malicious actors.