Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

Advisory record · GHSA-8c9q-7855-wfxq

File Browser has a Command Execution Allowlist Bypass via Shell Metacharacter Injection

CVSS 8.7 HighEPSS 0.0044 · 38th percentile

Published by the GitHub Advisory Database at 12 Jun 2026, 22:52 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/filebrowser/filebrowser/v2Go<2.33.82.33.8
Identifiers
GHSA-8c9q-7855-wfxq · CVE-2026-54090 · GO-2026-5250
Weakness (CWE)
CWE-77 · CWE-184
Tags
Published
12 Jun 2026
Updated
21 Jul 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Affected: File Browser (github.com/filebrowser/filebrowser/v2) before 2.33.8. The command execution allowlist checks only the first token of user input, but the full string is passed to a configured shell, so shell metacharacters such as semicolons or pipes let a user chain arbitrary commands. An attacker needs an account with Execute permission and at least one allowed command, and the administrator must have enabled command execution with a shell configured. Upgrade to 2.33.8 or later. Command execution is disabled by default from 2.33.8 onward.

Written 6 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.7 High 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0044, the 38th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:05 UTC First seen by agentprime
  2. 31 Oct 2026, 15:05 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.