{"id":"CVE-2025-65106","state":"PUBLISHED","title":"LangChain Vulnerable to Template Injection via Attribute Access in Prompt Templates","description":"LangChain is a framework for building agents and LLM-powered applications. From versions 0.3.79 and prior and 1.0.0 to 1.0.6, a template injection vulnerability exists in LangChain's prompt template system that allows attackers to access Python object internals through template syntax. This vulnerability affects applications that accept untrusted template strings (not just template variables) in ChatPromptTemplate and related prompt template classes. This issue has been patched in versions 0.3.80 and 1.0.7.","publishedAt":"2025-11-21T21:43:02.461Z","updatedAt":"2025-11-21T21:53:19.566Z","severity":{"score":8.3,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["langchain-ai langchain"],"affected":[{"vendor":"langchain-ai","product":"langchain","versions":[{"version":">= 1.0.0, < 1.0.7","status":"affected"},{"version":"< 0.3.80","status":"affected"}]}],"references":["https://github.com/langchain-ai/langchain/security/advisories/GHSA-6qv9-48xg-fc7f","https://github.com/langchain-ai/langchain/commit/c4b6ba254e1a49ed91f2e268e6484011c540542a","https://github.com/langchain-ai/langchain/commit/fa7789d6c21222b85211755d822ef698d3b34e00"],"weaknesses":["CWE-1336"],"ingestedAt":"2026-10-29T20:09:56.034Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/65xxx/CVE-2025-65106.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-65106","state":"PUBLISHED","datePublished":"2025-11-21T21:43:02.461Z","dateUpdated":"2025-11-21T21:53:19.566Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2025-11-17T20:55:34.694Z"},"containers":{"cna":{"title":"LangChain Vulnerable to Template Injection via Attribute Access in Prompt Templates","descriptions":[{"lang":"en","value":"LangChain is a framework for building agents and LLM-powered applications. From versions 0.3.79 and prior and 1.0.0 to 1.0.6, a template injection vulnerability exists in LangChain's prompt template system that allows attackers to access Python object internals through template syntax. This vulnerability affects applications that accept untrusted template strings (not just template variables) in ChatPromptTemplate and related prompt template classes. This issue has been patched in versions 0.3.80 and 1.0.7."}],"affected":[{"vendor":"langchain-ai","product":"langchain","versions":[{"version":">= 1.0.0, < 1.0.7","status":"affected"},{"version":"< 0.3.80","status":"affected"}]}],"references":[{"url":"https://github.com/langchain-ai/langchain/security/advisories/GHSA-6qv9-48xg-fc7f","name":"https://github.com/langchain-ai/langchain/security/advisories/GHSA-6qv9-48xg-fc7f","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/langchain-ai/langchain/commit/c4b6ba254e1a49ed91f2e268e6484011c540542a","name":"https://github.com/langchain-ai/langchain/commit/c4b6ba254e1a49ed91f2e268e6484011c540542a","tags":["x_refsource_MISC"]},{"url":"https://github.com/langchain-ai/langchain/commit/fa7789d6c21222b85211755d822ef698d3b34e00","name":"https://github.com/langchain-ai/langchain/commit/fa7789d6c21222b85211755d822ef698d3b34e00","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.3,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1336","lang":"en","description":"CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2025-11-21T21:43:02.461Z"},"source":{"advisory":"GHSA-6qv9-48xg-fc7f","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-11-21T21:53:02.259742Z","id":"CVE-2025-65106","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-11-21T21:53:19.566Z"}}]}}}