Vulnerability in superjson (CVE-2022-23631)
Summary
Vulnerability in superjson (CVE-2022-23631). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 1.8.1 or later.
Original description
The description as published by the source.
Impact
This is critical vulnerability, as it allows to run arbitrary code on any server using superjson input, including a Blitz.js server, without prior authentication or knowledge. Attackers gain full control over the server so they could steal and manipulate data or attack further systems. The only requirement is that the server implements at least one endpoint which uses superjson during request processing. In the case of Blitz.js, it would be at least one RPC call.
Patches
This has been patched in superjson 1.8.1 and Blitz.js 0.45.3.
If you are unable to upgrade to Blitz.js 0.45.3 in a timely manner, you can instead upgrade only superjson to version 1.8.1 using yarn resolutions are similar. Blitz versions < 0.45.3 are only affected because they used superjson versions < 1.8.1.
Workarounds
None
For more information
If you have any questions or comments about this advisory:
- Open an issue in https://github.com/blitz-js/superjson
- Email us at b@bayer.ws
References
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
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-2022-23631 has been found in superjson.
Successful exploitation can lead to full system takeover.
What to do: upgrade superjson to 1.8.1 or later.
If unsure, ask your IT team or search "superjson CVE-2022-23631" on the vendor's site.
CVE-2022-23631 (superjson) — CWE-1321
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 1.8.1 — 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-1321) exists in superjson.
Check the vendor advisory for the affected versions of superjson.
Severity: ?. Successful exploitation can lead to full system takeover.
Update to 1.8.1.
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 'superjson' . 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 'superjson' . | 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
superjson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 superjson to 1.8.1ステージング環境で 1.8.1 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
- advisory nvd.nist.gov
- advisory github.com
- package github.com
- web github.com
- web sonarsource.com