CVSS 4.0
7.4 highCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:H/SI:H/SA:HCVE-2025-64439
High (7.4). EPSS 0.9% chance of exploitation in the next 30 days. Fixed in langgraph-checkpoint 3.0.0.
LangGraph SQLite Checkpoint is an implementation of LangGraph CheckpointSaver that uses SQLite DB (both sync and async, via aiosqlite). In versions 2.1.2 and below, the JsonPlusSerializer (used as the default serialization protocol for all checkpointing) contains a Remote Code Execution (RCE) vulnerability when deserializing payloads saved in the "json" serialization mode. By default, the serializer attempts to use "msgpack" for serialization. However, prior to version 3.0 of the checkpointer library, if illegal Unicode surrogate values caused serialization to fail, it would fall back to using the "json" mode. This issue is fixed in version 3.0.0.
Severity
- EPSS
- 0.9% chance of exploitation in the next 30 days; higher than 59% of CVEs (scores of 2026-10-31)
- CWE
- CWE-502
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-wwqv-p2pp-99h5 | PyPI | langgraph-checkpoint | <3.0.0 | 3.0.0 |
| PYSEC-2026-1527 | PyPI | langgraph-checkpoint | <3.0.0 | 3.0.0 |
References
- https://github.com/langchain-ai/langgraph/blob/c5744f583b11745cd406f3059903e17bbcdcc8ac/libs/checkpoint/langgraph/checkpoint/serde/jsonplus.py
- https://github.com/langchain-ai/langgraph/commit/c5744f583b11745cd406f3059903e17bbcdcc8ac
- https://github.com/langchain-ai/langgraph/releases/tag/checkpoint%3D%3D3.0.0
- https://github.com/langchain-ai/langgraph/security/advisories/GHSA-wwqv-p2pp-99h5