LangSmith Client SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning (langchain-ai langsmith-sdk)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.20 % · percentile 10 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Awaiting Analysis
Description
LangSmith Client SDKs provide SDK's for interacting with the LangSmith platform. Prior to LangSmith SDK Python 0.8.0 and JS/TS 0.6.0, the LangSmith SDK's prompt pull methods (pull_prompt / pull_prompt_commit in Python, pullPrompt / pullPromptCommit in JS/TS) fetch and deserialize prompt manifests from the LangSmith Hub. These manifests may contain serialized LangChain objects and model configuration that affect runtime behavior. When pulling a public prompt by owner/name identifier, the manifest content is controlled by an external party, but prior versions of the SDK did not distinguish this from pulling a prompt within the caller's own organization. This vulnerability is fixed in LangSmith SDK Python 0.8.0 and JS/TS 0.6.0.
Weaknesses (CWE)
- CWE-502 — Deserialization of Untrusted Data
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N | GitHub_M |
| CVSS 3.1 | HIGH 7.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N | NVD · security-advisories@github.com (Secondary) |
Advisories
- GHSA-3644-q5cj-c5c7 — LangSmith SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning
- PYSEC-2026-2555 — LangSmith SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning
- PYSEC-2026-2560 — LangSmith SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning
- PYSEC-2026-2582 — LangSmith SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning
European references
- ENISA EUVD · EUVD-2026-32640
- GCVE · GCVE-0-2026-45134
Affected products
| Product | Versions |
|---|---|
| langchain-ai · langsmith-sdk | affected < 0.8.0 ; affected < 0.6.0 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |