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CVE-2026-62843

File Browser: Archive builder turns backslash filenames into path traversal (zip-slip)

Published: Jul 15, 2026Updated: Jul 15, 2026 Sources: CVE List NVDCWE-22
6.8MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 82.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

Description

File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. From 2.63.6 to 2.63.16, File Browser's archive builder uses strings.ReplaceAll(nameInArchive, "\", "/"), which turns a POSIX filename such as ..\..\evil.sh into the archive entry ../../evil.sh, allowing a user with upload permission to plant a backslash-named file that escapes the extraction directory when another user downloads and extracts the generated zip or tar archive. This issue is fixed in version 2.63.17.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:RS:CC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-22CWE-23

Affected Products

filebrowser
oss-project
filebrowserOn-prem
Web & CMS Plugins / site-builder

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Collection
Discovery
View detailed technique mapping

References

https://github.com/filebrowser/filebrowser/commit/8503ba61ff51d48a7313896483d130eb6a5abfe0
github.com
https://github.com/filebrowser/filebrowser/releases/tag/v2.63.17
github.com
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-83xp-526h-j3ww
github.com

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