← Back
CVE-2026-40036
high
CVSS 7.5
Vulnerability in dfir-unfurl (CVE-2026-40036)
Summary
vulnerability in dfir-unfurl (CVE-2026-40036). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `20260405` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-40036** has been found in dfir-unfurl.
Risk of unauthorized operations or information disclosure. CVSS score: 7.5/10.
What to do: upgrade dfir-unfurl to **20260405** or later.
If unsure, ask your IT team or search "dfir-unfurl CVE-2026-40036" on the vendor's site.
CVE-2026-40036 (dfir-unfurl) — CWE-400 / CVSS v3 7.5
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: `20260405` — 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
**A vulnerability** (CWE-400) exists in dfir-unfurl.
📍 Affected scope
dfir-unfurl — .
🔥 Severity
Severity: High (CVSS 7.5/10). Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **20260405**.
🛡️ 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 request patterns matching this CVE's known IOCs. Run `grep -r 'dfir-unfurl' .` 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
-
1Identify exposure identify
grep -r 'dfir-unfurl' . | 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 `dfir-unfurl` を grep し、稼働しているサービス・バージョンを把握する。
-
6Apply patch patch
Upgrade dfir-unfurl to 20260405ステージング環境で 20260405 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。
-
7Post-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 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
PyPI
dfir-unfurl
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"20260405"}]}]
References
- advisory https://nvd.nist.gov/vuln/detail/CVE-2026-40036
- advisory https://github.com/advisories/GHSA-h5qv-qjv4-pc5m
- package https://github.com/obsidianforensics/unfurl
- package https://pypi.org/project/dfir-unfurl
- web [email protected]
- web https://github.com/obsidianforensics/unfurl/security/advisories/GHSA-h5qv-qjv4-pc5m
- web https://www.vulncheck.com/advisories/dfir-unfurl-denial-of-service-via-unbounded-zlib-decompression
- web https://github.com/RyanDFIR/unfurl/pull/243
- web https://github.com/RyanDFIR/unfurl/commit/7cc711a65b106742a21080b755f81c17b5725aa8
- web https://github.com/RyanDFIR/unfurl/releases/tag/v2026.04