{
 "public_id": "AIR-2026-0104",
 "incident_id": "2026-05-langsmith-sdk-public-prompt-pull",
 "date_disclosed": "2026-05-07",
 "date_occurred": null,
 "title": "CVE-2026-45134: LangSmith SDK deserializes public Hub prompt manifests as trusted, enabling SSRF and credential theft",
 "class": "responsible_disclosure",
 "attack_surface": "agent_framework",
 "initial_vector": "malicious_public_prompt_in_langsmith_hub",
 "agent_capability_abused": [
  "prompt_hub_pull",
  "llm_client_configuration"
 ],
 "target_product": "LangSmith SDK, langchain, langchain-classic",
 "target_vendor": "LangChain Inc.",
 "autonomy_level": "assistant",
 "impact_realized": false,
 "impact_type": [
  "ssrf",
  "credential_theft",
  "response_manipulation"
 ],
 "blast_radius": "langchain < 0.3.30, langchain-classic < 1.0.7, langsmith pip < 0.8.0, langsmith npm < 0.6.0",
 "cve": [
  "CVE-2026-45134"
 ],
 "taxonomy": {
  "owasp_asi": [
   "ASI04",
   "ASI03"
  ],
  "mitre_atlas": [],
  "labels": [
   "supply_chain",
   "untrusted_manifest",
   "trust_boundary",
   "ssrf",
   "agent_registry"
  ]
 },
 "defense_present": "none - external prompts were treated as trusted code with no warning",
 "defense_bypassed": true,
 "fix_shipped": "langchain 0.3.30, langchain-classic 1.0.7, langsmith 0.8.0 (pip) / 0.6.0 (npm); public pulls now require an explicit dangerously_pull_public_prompt flag",
 "primary_sources": [
  "https://github.com/advisories/GHSA-3644-q5cj-c5c7"
 ],
 "verified_quote": "the manifest content is controlled by an external party",
 "confidence": "high",
 "notes": "GHSA-3644-q5cj-c5c7, CVSS 7.1 High, published 2026-05-07. This is the SDK-side recurrence of the 2024/2025 AgentSmith issue: an attacker publishes a prompt that configures the LLM client with an attacker-controlled endpoint. The fix is a mandatory opt-in flag rather than a sanitizer, which is a notable design admission about untrusted agent artifacts.",
 "risk_category": "security_fraud",
 "risk_secondary": [],
 "risk_subcategory": "Server-Side Request Forgery via LLM",
 "risk_sub_secondary": [
  "Supply Chain Compromise",
  "Credential & Secret Theft"
 ],
 "ai_entity": "generative",
 "agency": "ai_as_target",
 "agency_debatable": false,
 "agency_reason": "the SDK deserializes public Hub manifests as trusted",
 "vector_family": "malicious_component",
 "vector_detail": "malicious_public_prompt_in_langsmith_hub",
 "guardrail_kind": [
  "none"
 ],
 "guardrail_outcome": "not_applicable",
 "xrefs": {
  "aiid": [],
  "atlas": [],
  "cve": [
   "CVE-2026-45134"
  ],
  "ghsa": []
 },
 "primary_asi": "ASI04",
 "agent_framework": "langchain",
 "model_provider": "unknown",
 "model_name": "",
 "detection_mechanism": "unknown",
 "tool_access": "unknown",
 "financial_loss_band": "unknown",
 "eai_category": "confused_deputy",
 "eai_domain": "access_control_and_permissions",
 "eai_secondary": [
  "credential_theft",
  "supply_chain_vulnerabilities"
 ],
 "eai_reason": "subcategory: Server-Side Request Forgery via LLM",
 "asi_curated": [],
 "asi_scope": "in_scope",
 "asi_provenance": "rule",
 "asi_reason": "ASI04 (vector_family=malicious_component); ASI03 (eai_category=confused_deputy)",
 "submitted_by": "EAI Internal"
}