{"id":"CVE-2026-28277","state":"PUBLISHED","title":"LangGraph: Unsafe msgpack deserialization in LangGraph checkpoint loading","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.","publishedAt":"2026-03-05T19:10:36.865Z","updatedAt":"2026-03-06T18:04:29.687Z","severity":{"score":6.8,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["langchain-ai langgraph"],"affected":[{"vendor":"langchain-ai","product":"langgraph","versions":[{"version":"<= 1.0.9","status":"affected"}]}],"references":["https://github.com/langchain-ai/langgraph/security/advisories/GHSA-g48c-2wqr-h844"],"weaknesses":["CWE-502"],"ingestedAt":"2026-10-29T20:11:31.369Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/28xxx/CVE-2026-28277.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-28277","state":"PUBLISHED","datePublished":"2026-03-05T19:10:36.865Z","dateUpdated":"2026-03-06T18:04:29.687Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-02-26T01:52:58.734Z"},"containers":{"cna":{"title":"LangGraph: Unsafe msgpack deserialization in LangGraph checkpoint loading","descriptions":[{"lang":"en","value":"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":[{"vendor":"langchain-ai","product":"langgraph","versions":[{"version":"<= 1.0.9","status":"affected"}]}],"references":[{"url":"https://github.com/langchain-ai/langgraph/security/advisories/GHSA-g48c-2wqr-h844","name":"https://github.com/langchain-ai/langgraph/security/advisories/GHSA-g48c-2wqr-h844","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":6.8,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-502","lang":"en","description":"CWE-502: Deserialization of Untrusted Data","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-03-05T19:10:36.865Z"},"source":{"advisory":"GHSA-g48c-2wqr-h844","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-06T18:04:22.963963Z","id":"CVE-2026-28277","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-03-06T18:04:29.687Z"}}]}}}