Medium severity · published Oct 14, 2026
CVE-2026-57491
FileRise: ZIP extraction writes blocked file extensions to disk, bypassing the upload blocklist
6.5
CVSS
0.3%
EPSS
No
On KEV
Description
FileRise is a self-hosted web-based file manager with multi-file upload, editing, and batch operations. Prior to 3.16.0, FileRise archive extraction does not apply UploadNamePolicy::isAllowedForWrite() before ZipArchive::extractTo() writes entries into the destination directory. An authenticated user with upload and extract permissions can place a blocked extension such as a PHP-family file inside a ZIP and cause it to be written to disk even when normal uploads reject that filename. Post-extraction metadata pruning does not remove the blocked file, so deployments that execute uploaded content may permit code execution. This issue is fixed in version 3.16.0.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
FileRise · error311
< 3.16.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-57491
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-57491
github.com
https://github.com/error311/FileRise/commit/f7114ca2a4e624238dda0d097a07ad6b05c11bb6
github.com
https://github.com/error311/FileRise/releases/tag/v3.16.0
github.com
https://github.com/error311/FileRise/security/advisories/GHSA-c4g2-8fg6-5xrr
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