CVE-2026-57491
MEDIUM 6.5FileRise 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.
No known exploitation, public exploit, or elevated probability at this time. Track for changes.
Exploitation likelihood
0.3%chance of exploitation in 30 days · 28th percentile
Impact if exploited
6.5CVSS 3.1 · MEDIUM
- ConfidentialityNone
- IntegrityHigh
- AvailabilityNone
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ⚠Privileges: Requires a low-privilege account
- ✓User interaction: No user interaction needed
- ✓Complexity: No special conditions — reliably repeatable
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
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Data snapshot:
Weakness (CWE)
- CWE-434: : Unrestricted Upload of File with Dangerous Type
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
References and research data (JSON)
All CVSS metrics
- MEDIUM 6.5 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N - MEDIUM 6.5 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
References
Exploit-tagged references (not proof of a PoC)
- https://github.com/error311/FileRise/security/advisories/GHSA-c4g2-8fg6-5xrr CVE record · GitHub_M · Updated 2026-10-14T20:17:04.140Z
CVE record · CISA-ADP · Updated 2026-10-15T18:52:12.800Z
NVD · CVE-2026-57491 · Updated 2026-10-15T19:17:41.620
Advisories
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-101635 EUVD · EUVD-2026-101635
Technical & other
- https://github.com/error311/FileRise/commit/f7114ca2a4e624238dda0d097a07ad6b05c11bb6 CVE record · GitHub_M · Updated 2026-10-14T20:17:04.140Z
NVD · CVE-2026-57491 · Updated 2026-10-15T19:17:41.620 - https://github.com/error311/FileRise/releases/tag/v3.16.0 CVE record · GitHub_M · Updated 2026-10-14T20:17:04.140Z
NVD · CVE-2026-57491 · Updated 2026-10-15T19:17:41.620