CVE-2026-29188: File Browser's TUS Delete Endpoint Bypasses Delete Permission Check

Should you act?

Critical and remotely reachable

No known exploitation yet, but it is network-reachable without credentials. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.

• Not in CISA KEV, but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
• EPSS 0.6%, percentile 48: FIRST’s model estimates a 0.6% chance of exploitation activity in the next 30 days, higher than 48% of all scored CVEs (low). EPSS is a probability, not a verdict.
• Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
• Only applies if your dependency tree includes github.com/filebrowser/filebrowser/v2 (Go) <= 2.61.0, fixed in 2.61.1. Check your lockfile, including transitive dependencies.

What it is

File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename and edit files. Prior to version 2.61.1, a broken access control vulnerability in the TUS protocol DELETE endpoint allows authenticated users with only Create permission to delete arbitrary files and directories within their scope, bypassing the intended Delete permission restriction. Any multi-user deployment where administrators explicitly restrict file deletion for certain users is affected. This issue has been patched in version 2.61.1.

From the GitHub advisory

Summary

A broken access control vulnerability in the TUS protocol DELETE endpoint allows authenticated users with only Create permission to delete arbitrary files and directories within their scope, bypassing the intended Delete permission restriction. Any multi-user deployment where administrators explicitly restrict file deletion for certain users is affected.

Details

The tusDeleteHandler function in http/tushandlers.go incorrectly gates the DELETE operation behind Perm.Create instead of Perm.Delete:

The correct resourceDeleteHandler in http/resource.go properly checks Perm.Delete:

Weakness type: CWE-732, CWE-284.

Product: github.com/filebrowser/filebrowser/v2 (Go) · Assigned by: GitHub_M · Published: 2026-03-05

Affected and fixed versions

Severity scores

• Attack vector: network (remotely reachable)
• Attack complexity: low
• Privileges required: none (no login)
• User interaction: none
• Scope: unchanged

CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.

Exploitation and urgency

• CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
• CISA SSVC assessment: exploitation poc, automatable yes, technical impact partial.
• FIRST EPSS (model of 2026-10-21): 0.61% probability of exploitation activity in the next 30 days; percentile 48.

Timeline

• 2026-03-04 — GitHub-reviewed advisory GHSA-79pf-vx4x-7jmm published (critical)
• 2026-03-05 — CVE record published by GitHub_M
• 2026-03-06 — CVE record last updated

Sources and references

Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.

Vulnerability records

1. GitHub Advisory GHSA-79pf-vx4x-7jmm github.com
2. CVE.org record CVE-2026-29188 cve.org
3. NVD entry CVE-2026-29188 nvd.nist.gov

Other references from the CVE record and advisory

1. github.com github.com
2. github.com github.com
3. github.com github.com

Critical Go advisories · Today’s Security Digest