Code Injection in @payloadcms/plugin-form-builder (CVE-2026-105857)
Summary
Code injection in @payloadcms/plugin-form-builder (CVE-2026-105857). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 4.0.0-canary.34 or later.
Original description
The description as published by the source.
Impact
A vulnerability in @payloadcms/plugin-form-builder in versions < 3.90.0 allow submissions which could be crafted to execute remote code on the server.
You are affected if:
- You are using
@payloadcms/plugin-form-builder
Patches
Users should upgrade Payload packages to >= 3.90.0 or >= 4.0.0-canary.34.
Source: NIST National Vulnerability Database 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-2026-105857 has been found in @payloadcms/plugin-form-builder.
Successful exploitation can lead to full system takeover. CVSS score: 10.0/10.
What to do: upgrade @payloadcms/plugin-form-builder to 4.0.0-canary.34 or later.
If unsure, ask your IT team or search "@payloadcms/plugin-form-builder CVE-2026-105857" on the vendor's site.
CVE-2026-105857 (@payloadcms/plugin-form-builder) — CWE-94 / CVSS v3 10.0
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 4.0.0-canary.34 — 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.
Arbitrary code execution (CWE-94) exists in @payloadcms/plugin-form-builder.
Check the vendor advisory for the affected versions of @payloadcms/plugin-form-builder.
Severity: Critical (CVSS 10.0/10). Successful exploitation can lead to full system takeover.
Update to 4.0.0-canary.34.
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 '@payloadcms/plugin-form-builder' . 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 '@payloadcms/plugin-form-builder' . | 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
@payloadcms/plugin-form-builder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 @payloadcms/plugin-form-builder to 4.0.0-canary.34ステージング環境で 4.0.0-canary.34 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
- patch security-advisories@github.com
- patch security-advisories@github.com
- patch security-advisories@github.com
- web nvd.nist.gov
- web github.com