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CVE-2025-64439
Unsafe Deserialization in langgraph-checkpoint (CVE-2025-64439)
Summary
vulnerability in langgraph-checkpoint (CVE-2025-64439). Risk of unauthorized operations or information disclosure. Exploitable via ``JsonPlusSerializer``. Mitigation: upgrade to `3.0.0` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2025-64439** has been found in langgraph-checkpoint.
Attackers can target a specific entry point like ``JsonPlusSerializer`` over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: upgrade langgraph-checkpoint to **3.0.0** or later.
If unsure, ask your IT team or search "langgraph-checkpoint CVE-2025-64439" on the vendor's site.
CVE-2025-64439 (langgraph-checkpoint) — CWE-502 /
Attack surface: `JsonPlusSerializer`
Patched: `3.0.0` — 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
**unsafe deserialization** (CWE-502) exists in langgraph-checkpoint. Attackers reach the vulnerable code path via ``JsonPlusSerializer`` without authentication.
📍 Affected scope
langgraph-checkpoint — . Attack surface: `JsonPlusSerializer`.
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **3.0.0**.
🛡️ 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 'langgraph-checkpoint' .` 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
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1Identify exposure identify
grep -r 'langgraph-checkpoint' . | 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 `langgraph-checkpoint` 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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6Apply patch patch
Upgrade langgraph-checkpoint to 3.0.0ステージング環境で 3.0.0 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
PyPI
langgraph-checkpoint
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.0"}]}]
References
- advisory https://nvd.nist.gov/vuln/detail/CVE-2025-64439
- advisory https://github.com/advisories/GHSA-wwqv-p2pp-99h5
- package https://github.com/langchain-ai/langgraph
- package https://pypi.org/project/langgraph-checkpoint
- web https://github.com/langchain-ai/langgraph/security/advisories/GHSA-wwqv-p2pp-99h5
- web https://github.com/langchain-ai/langgraph/commit/c5744f583b11745cd406f3059903e17bbcdcc8ac
- web https://github.com/langchain-ai/langgraph/blob/c5744f583b11745cd406f3059903e17bbcdcc8ac/libs/checkpoint/langgraph/checkpoint/serde/jsonplus.py
- web https://github.com/langchain-ai/langgraph/releases/tag/checkpoint%3D%3D3.0.0