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https://github.com/danny-avila/LibreChat.git
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951d261f5c
* 🔒 fix: Resolve env vars before body placeholder expansion to prevent secret exfiltration Body placeholders ({{LIBRECHAT_BODY_*}}) were substituted before extractEnvVariable ran, allowing user-controlled body fields containing ${SECRET} patterns to be expanded into real environment values in outbound headers. Reorder so env vars resolve first, preventing untrusted input from triggering env expansion. * 🛡️ fix: Block sensitive infrastructure env vars from placeholder resolution Add isSensitiveEnvVar blocklist to extractEnvVariable so that internal infrastructure secrets (JWT_SECRET, JWT_REFRESH_SECRET, CREDS_KEY, CREDS_IV, MEILI_MASTER_KEY, MONGO_URI, REDIS_URI, REDIS_PASSWORD) can never be resolved via ${VAR} expansion — even if an attacker manages to inject a placeholder pattern. Uses exact-match set (not substring patterns) to avoid breaking legitimate operator config that references OAuth/API secrets in MCP and custom endpoint configurations. * 🧹 test: Rename ANOTHER_SECRET test fixture to ANOTHER_VALUE Avoid using SECRET-containing names for non-sensitive test fixtures to prevent confusion with the new isSensitiveEnvVar blocklist. * 🔒 fix: Resolve env vars before all user-controlled substitutions in processSingleValue Move extractEnvVariable to run on the raw admin-authored template BEFORE customUserVars, user fields, OIDC tokens, and body placeholders. Previously env resolution ran after customUserVars, so a user setting a custom MCP variable to "${SECRET}" could still trigger env expansion. Now env vars are resolved strictly on operator config, and all subsequent user-controlled substitutions cannot introduce ${VAR} patterns that would be expanded. Gated by !dbSourced so DB-stored servers continue to skip env resolution. Adds a security-invariant comment documenting the ordering requirement. * 🧪 test: Comprehensive security regression tests for placeholder injection - Cover all three body fields (conversationId, parentMessageId, messageId) - Add user-field injection test (user.name containing ${VAR}) - Add customUserVars injection test (MY_TOKEN = "${VAR}") - Add processMCPEnv injection tests for body and customUserVars paths - Remove redundant process.env setup/teardown already handled by beforeEach/afterEach * 🧹 chore: Add REDIS_PASSWORD to blocklist integration test; document customUserVars gate |
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