Is langsmith affected by CVE-2026-45134?

npm langsmith is affected in <0.6.0.

Is CVE-2026-45134 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.2%.

high

CVE-2026-45134

Q: Is CVE-2026-45134 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.2%.

npm · langsmith • PyPI · langsmith • PyPI · langchain-classic • PyPI · langchain

Summary

LangSmith SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning

Severity: high
EPSS: 0.2% (p10)
Also known as: GHSA-3644-q5cj-c5c7, GHSA-3644-q5cj-c5c7#langchain, GHSA-3644-q5cj-c5c7#langchain-classic, GHSA-3644-q5cj-c5c7#langsmith
Published: 2026-05-13

References

https://github.com/langchain-ai/langsmith-sdk/security/advisories/GHSA-3644-q5cj-c5c7
https://nvd.nist.gov/vuln/detail/CVE-2026-45134
https://github.com/langchain-ai/langsmith-sdk

Related advisories

CVE-2026-41182 — medium · PyPI/langsmith
CVE-2026-40190 — medium · npm/langsmith
CVE-2026-25528 — medium · PyPI/langsmith

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.