What’s Vulnerable › Vulnerabilities
CVE-2026-28277: LangGraph: Unsafe msgpack deserialization in LangGraph checkpoint loading
- Severity: high (CVSS 7.2 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 4.9% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-03-05 · updated 2026-06-17
- Weakness: CWE-502
Description
LangGraph SQLite Checkpoint is an implementation of LangGraph CheckpointSaver that uses SQLite DB (both sync and async, via aiosqlite). In version 1.0.9 and prior, LangGraph checkpointers can load msgpack-encoded checkpoints that reconstruct Python objects during deserialization. If an attacker can modify checkpoint data in the backing store (for example, after a database compromise or other privileged write access to the persistence layer), they can potentially supply a crafted payload that triggers unsafe object reconstruction when the checkpoint is loaded. No known patch is public.
Affected products
- langchain-ai langgraph: through 1.0.9
References
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