Deserialization in Langchain Langgraph-checkpoint
CVE-2026-48775
LangGraph SQLite Checkpoint is an implementation of LangGraph CheckpointSaver that uses SQLite DB (both sync and async, via aiosqlite). In versions 4.1.0 and prior, the JsonPlusSerializer can reconstruct Python objects from JSON checkpoint…
Vulnerability class: Insecure Deserialization
EPSS: 0.002 (14.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Langchain Langgraph-checkpoint
- Langchain-ai Langgraph — versions < 1.2.2
- Langchain-ai Langraph-checkpoint — versions < 4.1.1
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-48775?
- CVE-2026-48775 is a medium-severity vulnerability in Langchain Langgraph-checkpoint, classified under Deserialization of Untrusted Data. CVSS score: 6.8/10. Published 2026-06-16.
- How severe is CVE-2026-48775?
- Medium severity. CVSS v3 base score is 6.8 out of 10.