What’s Vulnerable › Vulnerabilities

CVE-2026-62843: File Browser: Archive builder turns backslash filenames into path traversal (zip-slip)

• Severity: medium (CVSS 6.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-15 · updated 2026-07-15
• Weakness: CWE-22

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.

Affected products

• filebrowser: from 2.63.6, < 2.63.17

References

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

Get alerted when CVE-2026-62843 or the next vulnerability affects your stack