CVE-2026-40190
1 advisory.
npm/langsmith CVE-2026-40190: medium 5.6
LangSmith Client SDKs has Prototype Pollution in langsmith-sdk via Incomplete `__proto__` Guard in Internal lodash `set()`
Action: Upgrade langsmith to 0.5.18 or later.
npm i langsmith@0.5.18Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 0.5.18 | - |
Fixed versions
| 0.5.18 |
Sources
- 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
CVE-2026-40190 · published · modified · JSON