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CVE-2026-44542
critical
CVSS 9.1
Path Traversal in github.com/gtsteffaniak/filebrowser (CVE-2026-44542)
Summary
path traversal in github.com/gtsteffaniak/filebrowser (CVE-2026-44542). Data can be tampered with by attackers. Exploitable via `DELETE /public/api/resources`. Mitigation: upgrade to `0.0.0-20260501183844-112740bdd41d` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-44542** has been found in github.com/gtsteffaniak/filebrowser.
Attackers can target a specific entry point like `DELETE /public/api/resources` over the network to misuse the product.
Data can be tampered with by attackers. CVSS score: 9.1/10.
What to do: upgrade github.com/gtsteffaniak/filebrowser to **0.0.0-20260501183844-112740bdd41d** or later.
If unsure, ask your IT team or search "github.com/gtsteffaniak/filebrowser CVE-2026-44542" on the vendor's site.
CVE-2026-44542 (github.com/gtsteffaniak/filebrowser) — CWE-22 / CVSS v3 9.1
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: DELETE /public/api/resources / DELETE /public/api/resources/bulk
Patched: `0.0.0-20260501183844-112740bdd41d` — 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.
❓ What is the problem
**Path traversal** (CWE-22) exists in github.com/gtsteffaniak/filebrowser. Attackers reach the vulnerable code path via `DELETE /public/api/resources` without authentication.
📍 Affected scope
github.com/gtsteffaniak/filebrowser — . Attack surface: DELETE /public/api/resources / DELETE /public/api/resources/bulk.
🔥 Severity
Severity: Critical (CVSS 9.1/10). Data can be tampered with by attackers
🔧 How to fix
Update to **0.0.0-20260501183844-112740bdd41d**.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual `DELETE /public/api/resources` requests with malformed payloads or SQL meta-characters. Run `grep -r 'github.com/gtsteffaniak/filebrowser' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'github.com/gtsteffaniak/filebrowser' . | 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` を grep し、稼働しているサービス・バージョンを把握する。
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3Hunt for indicators of compromise detect
grep 'DELETE /public/api/resources' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'アクセスログで `DELETE /public/api/resources` への異常なリクエスト (不正な認証ヘッダ・SQLメタ文字)を過去 30〜90日分捜索。WAF/SIEM があれば該当パスのアラート発火履歴を確認。
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6Apply patch patch
Upgrade github.com/gtsteffaniak/filebrowser to 0.0.0-20260501183844-112740bdd41dステージング環境で 0.0.0-20260501183844-112740bdd41d 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と、Step 3 で見つけた異常検知の続報チェックを含めること。
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7Post-deployment verification verify
Replay attack against DELETE /public/api/resources on staging to confirm patch closes the vector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 Step 3 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
go
github.com/gtsteffaniak/filebrowser
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.0.0-20260501183844-112740bdd41d"}]}]
References
- advisory https://nvd.nist.gov/vuln/detail/CVE-2026-44542
- exploit 134c704f-9b21-4f2e-91b3-4a467353bcc0
- package https://github.com/gtsteffaniak/filebrowser
- web https://github.com/gtsteffaniak/filebrowser/commit/112740bdd41de7d5eb01e13ba49d406bfc463f69
- web https://github.com/advisories/GHSA-fwj3-42wh-8673