CVE-2026-54567
Published:July 17, 2026
Updated:August 27, 2026
| Field | Value | |---|---| | Title | Extension-denylist bypass via case-folding asymmetry in name-override path (incomplete-fix variant of CVE-2026-27641) | | Project | Flask-Reuploaded ("flask_uploads") | | Affected | "<= 1.5.0" (latest release; commit "ae31c3f91da40b465ca5e8f57d93f063b4553e23") | | Relationship | Incomplete-fix variant of CVE-2026-27641 (fixed in v1.5.0; this variant survives that fix) | | CWE | CWE-434 (Unrestricted Upload of File with Dangerous Type) + CWE-178 (Improper Handling of Case Sensitivity) | | CVSS v3.1 (proposed) | ~7.0–7.3 (High, conditional) — "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H". Final score deferred to maintainer. | | Verified against | "pip install Flask-Reuploaded==1.5.0", Python 3.11 | ***
Affected Packages
flask-reuploaded (PYTHON):
Affected version(s) >=0.3 <1.6.0Fix Suggestion:
Update to version 1.6.0Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.7
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH