Vulnerability in github.com/gtsteffaniak/filebrowser/backend (CVE-2026-54685)
Summary
Vulnerability in github.com/gtsteffaniak/filebrowser/backend (CVE-2026-54685). Risk of unauthorized operations or information disclosure. Exploitable via Auth. Mitigation: upgrade to 0.0.0-20260317230626-af08800667b8 or later.
Original description
The description as published by the source.
FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to version 1.3.2-beta, the /api/auth/login authentication endpoint does not execute in constant time. When a non-existent username is supplied, the server returns a 401/403 response almost immediately. When a valid username is provided, the server performs a bcrypt password comparison, causing a measurable delay in the response time. Version 1.3.2-beta patches the issue.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-54685 has been found in github.com/gtsteffaniak/filebrowser/backend.
Attackers can target a specific entry point like Auth over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 5.3/10.
What to do: upgrade github.com/gtsteffaniak/filebrowser/backend to 0.0.0-20260317230626-af08800667b8 or later.
If unsure, ask your IT team or search "github.com/gtsteffaniak/filebrowser/backend CVE-2026-54685" on the vendor's site.
CVE-2026-54685 (github.com/gtsteffaniak/filebrowser/backend) — CWE-208 / CVSS v3 5.3
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: Auth / JSONAuth / CheckPwd / admin
Patched: 0.0.0-20260317230626-af08800667b8 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-208) exists in github.com/gtsteffaniak/filebrowser/backend. Attackers reach the vulnerable code path via Auth without authentication.
Check the vendor advisory for the affected versions of github.com/gtsteffaniak/filebrowser/backend. Attack surface: Auth / JSONAuth / CheckPwd / admin.
Severity: Medium (CVSS 5.3/10). Risk of unauthorized operations or information disclosure.
Update to 0.0.0-20260317230626-af08800667b8.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'github.com/gtsteffaniak/filebrowser/backend' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'github.com/gtsteffaniak/filebrowser/backend' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
github.com/gtsteffaniak/filebrowser/backendを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade github.com/gtsteffaniak/filebrowser/backend to 0.0.0-20260317230626-af08800667b8ステージング環境で 0.0.0-20260317230626-af08800667b8 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- package github.com
- patch github.com
- web github.com
- web github.com