Vulnerability in CryptPad (CVE-2025-51846)
Summary
Vulnerability in CryptPad (CVE-2025-51846). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 2026.2.2 or later.
Original description
The description as published by the source.
CryptPad 2025.3.1 allows unbounded WebSocket frame flood. A remote, unauthenticated attacker can significantly degrade or deny service for all users of a CryptPad instance. Fixed in 2026.2.2.
Source: NIST National Vulnerability Database NVD
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-2025-51846 has been found in CryptPad.
Risk of unauthorized operations or information disclosure. CVSS score: 7.5/10.
What to do: upgrade CryptPad to 2026.2.2 or later.
If unsure, ask your IT team or search "CryptPad CVE-2025-51846" on the vendor's site.
CVE-2025-51846 (CryptPad) — CWE-770 / CVSS v3 7.5
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 2026.2.2 — 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-770) exists in CryptPad.
Check the vendor advisory for the affected versions of CryptPad.
Severity: High (CVSS 7.5/10). Risk of unauthorized operations or information disclosure.
Update to 2026.2.2.
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 'CryptPad' . 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
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1Identify exposure identify
grep -r 'CryptPad' . | 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
CryptPad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 CryptPad to 2026.2.2ステージング環境で 2026.2.2 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。
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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。
References
- advisory raw.githubusercontent.com
- advisory cve.org
- exploit github.com
- patch github.com