CVE-2026-40190Published
LangSmith Client SDKs has Prototype Pollution in langsmith-sdk via Incomplete `__proto__` Guard in Internal lodash `set()`
Explicit identifiers and source references
These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.
CVE-2026-40190 · Microsoft / collected KEV context
cve-program · CVE-2026-40190
euvd · EUVD-2026-21594
nvd · CVE-2026-40190
osv · GHSA-fw9q-39r9-c252
- https://github.com/langchain-ai/langsmith-sdk/security/advisories/GHSA-fw9q-39r9-c252
- https://nvd.nist.gov/vuln/detail/CVE-2026-40190
- https://github.com/langchain-ai/langsmith-sdk/pull/2690
- https://github.com/langchain-ai/langsmith-sdk/commit/31d3c3aec02892f4312baae112f817d6b2f0ebe3
- https://github.com/langchain-ai/langsmith-sdk
Related operational evidence
Explicit CVE identifiersNo related operational record is retained in the current change model.