CVE-2026-61843
HIGH 8.2FileRise is a self-hosted web-based file manager with multi-file upload, editing, and batch operations. Prior to 3.18.0, FileRise upload-enabled shared-folder and upload-only links do not reject a destination filename that already exists. An unauthenticated visitor with a valid share token and any configured share password can upload a file with the same name as an existing file and silently replace its content while the original uploader metadata remains. The same replacement gap affects ordinary authenticated uploads through /api/upload/upload.php and authenticated upload-only users who lack edit authority over the existing file. This issue is fixed in version 3.18.0.
Severe if exploited (CVSS 8.2), but no known exploitation and low modeled probability. Patch on a normal cadence.
Exploitation likelihood
0.4%chance of exploitation in 30 days · 31st percentile
Impact if exploited
8.2CVSS 3.1 · HIGH
- ConfidentialityNone
- IntegrityHigh
- AvailabilityLow
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ✓Privileges: No account or privileges required
- ✓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-862: : Missing Authorization
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
References and research data (JSON)
All CVSS metrics
- HIGH 8.2 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L - HIGH 8.2 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
References
Exploit-tagged references (not proof of a PoC)
- https://github.com/error311/FileRise/security/advisories/GHSA-r787-5hp3-4874 CVE record · GitHub_M · Updated 2026-10-14T20:22:57.741Z
CVE record · CISA-ADP · Updated 2026-10-15T15:05:44.030Z
NVD · CVE-2026-61843 · Updated 2026-10-15T16:18:18.850
Advisories
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-101667 EUVD · EUVD-2026-101667
Technical & other
- https://github.com/error311/FileRise/commit/9ed1a38f00918849dbda30f54291d1451ed80d11 CVE record · GitHub_M · Updated 2026-10-14T20:22:57.741Z
NVD · CVE-2026-61843 · Updated 2026-10-15T16:18:18.850 - https://github.com/error311/FileRise/releases/tag/v3.18.0 CVE record · GitHub_M · Updated 2026-10-14T20:22:57.741Z
NVD · CVE-2026-61843 · Updated 2026-10-15T16:18:18.850