{"id":"EUVD-2026-93771","revision":"0109ea625ee64df897e660b69bd65f95","records":[{"revision":"0109ea625ee64df897e660b69bd65f95","observedAt":"2026-10-30T01:52:06.169+00:00","statement":{"source":"euvd","id":"EUVD-2026-93771","aliases":["CVE-2026-106119","GHSA-m6rx-h84q-8r95"],"title":"LangChain is a framework for building LLM-powered applications. Prior to 1.3.1, MongoDBChatMessageHistory does not enforce the documented string type for an untrusted structured session identifier at runtime, allowing the identifier to be i…","description":"LangChain is a framework for building LLM-powered applications. Prior to 1.3.1, MongoDBChatMessageHistory does not enforce the documented string type for an untrusted structured session identifier at runtime, allowing the identifier to be interpreted as a MongoDB query condition rather than as a literal value when multiple users' histories are stored in a shared MongoDB collection. An attacker able to invoke chat-history operations can read, modify, or delete another user's stored conversation. Applications using authenticated, server-controlled string identifiers are not affected. This issue is fixed in version 1.3.1.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","score":6,"severity":null}],"references":["https://github.com/langchain-ai/langchainjs/security/advisories/GHSA-m6rx-h84q-8r95","https://github.com/langchain-ai/langchainjs/pull/11672","https://github.com/langchain-ai/langchainjs/commit/946e3d856ff1f8ce7f7b9374c83f680a6ada79af","https://github.com/langchain-ai/langchainjs/releases/tag/@langchain/mongodb@1.3.1"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-93771","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Oct 6, 2026, 6:01:24 PM","dateUpdated":"Oct 6, 2026, 7:45:43 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-93771","identifiers":["EUVD-2026-93771","CVE-2026-106119","GHSA-m6rx-h84q-8r95"]},"retained":false,"historicalAffected":[]}],"coverage":[]}