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CVE-2026-47266
Vulnerability in verbb/formie (CVE-2026-47266)
Summary
vulnerability in verbb/formie (CVE-2026-47266). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `2.2.21` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-47266** has been found in verbb/formie.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: upgrade verbb/formie to **2.2.21** or later.
If unsure, ask your IT team or search "verbb/formie CVE-2026-47266" on the vendor's site.
CVE-2026-47266 (verbb/formie) — CWE-639 /
Patched: `2.2.21` — apply immediately
Workaround: Block unauthenticated access to `actions/formie/submissions/save-submission`, or disable/customize front-end submission editing until patched.
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-639) exists in verbb/formie.
📍 Affected scope
verbb/formie — .
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **2.2.21**.
🛡️ Workaround
Workaround: Block unauthenticated access to `actions/formie/submissions/save-submission`, or disable/customize front-end submission editing until patched.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'verbb/formie' .` 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 'verbb/formie' . | 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 `verbb/formie` 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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5Apply temporary workaround mitigate
Block unauthenticated access to `actions/formie/submissions/save-submission`, or disable/customize front-end submission editing until patched.パッチが適用されるまでの応急処置として、Block unauthenticated access to `actions/formie/submissions/save-submission`, or disable/customize front-end submission editing until patched. を実施。回避策の副作用 (機能低下) を確認した上で。
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6Apply patch patch
Upgrade verbb/formie to 2.2.21ステージング環境で 2.2.21 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
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
composer
verbb/formie
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.21"}]}]
Packagist
verbb/formie
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.21"}]}]
References
- advisory https://nvd.nist.gov/vuln/detail/CVE-2026-47266
- package https://github.com/verbb/formie
- web https://github.com/verbb/formie/releases/tag/2.2.21
- web https://github.com/verbb/formie/releases/tag/3.1.26
- web https://github.com/verbb/formie/security/advisories/GHSA-pgxq-p76c-x9cg
- web https://github.com/advisories/GHSA-pgxq-p76c-x9cg