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PYSEC-2026-2573 LangGraph Checkpoint: Unsafe JSON deserialization in checkpoint loading

🗓️ 13 Jul 2026 15:46:23Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 3 Views

Summary LangGraph's JsonPlusSerializer can reconstruct Python objects from JSON checkpoint payloads. Under conditions where someone could modify checkpoint bytes at rest in the backing store, the deserialization path could reconstruct objects beyo...

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13 Jul 2026 16:31Current
6.4Medium risk
Vulners AI Score6.4
CVSS 3.16.8
EPSS0.00232
3