{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-31943 exists.","fix":"No fix has been published for CVE-2026-31943 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-31943 is a high-severity server-side request forgery vulnerability in Librechat Librechat, published on 27 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-31943 and fix it if it is affected.\n\nWhat it is: CVE-2026-31943 is a high-severity server-side request forgery vulnerability in Librechat Librechat, published on 27 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-31943 exists.\n\nAffected product: Librechat Librechat. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-31943/ (Markdown: https://insights.sbomify.com/CVE-2026-31943/index.md)","id":"CVE-2026-31943","markdown":"https://insights.sbomify.com/CVE-2026-31943/index.md","name":"CVE-2026-31943","record":{"aliases":["GHSA-w5r7-4f94-vp4c"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"LibreChat web application","requires_auth":"low_privilege","summary":"Authenticated users can bypass SSRF protections to access internal network resources and cloud metadata services.","user_interaction":"not_required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"librechat","vendor":"librechat"}],"cvss":{"score":8.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"}],"description":"LibreChat is a ChatGPT clone with additional features. Prior to version 0.8.3, `isPrivateIP()` in `packages/api/src/auth/domain.ts` fails to detect IPv4-mapped IPv6 addresses in their hex-normalized form, allowing any authenticated user to bypass SSRF protection and make the server issue HTTP requests to internal network resources — including cloud metadata services (e.g., AWS `169.254.169.254`), loopback, and RFC1918 ranges. Version 0.8.3 fixes the issue.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"LibreChat has SSRF protection bypass via IPv4-mapped IPv6 normalization in isPrivateIP","id":"CVE-2026-31943","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"librechat:librechat","products":["librechat:librechat"],"type":"ssrf","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"LibreChat MCP OAuth callback does not validate browser session — allows token theft via redirect link","id":"CVE-2026-31944"},"packages":[],"prev":{"headline":"LibreChat has IDOR in API Keys Management that allows any authenticated user to overwrite other users' API keys","id":"CVE-2026-31942"},"products":["LibreChat"],"published":"2026-03-27","related":[{"cvss_score":9.6,"headline":"LibreChat Exfiltrates Server Secrets via MCP Server URL Injection","id":"CVE-2026-32625","kev_date_added":null,"published":"2026-06-02"},{"cvss_score":9.4,"headline":"Improper Access Control in danny-avila/librechat","id":"CVE-2024-11167","kev_date_added":null,"published":"2025-03-20"},{"cvss_score":9.1,"headline":"LibreChat MCP Stdio Remote Command Execution","id":"CVE-2026-22252","kev_date_added":null,"published":"2026-01-12"},{"cvss_score":9.1,"headline":"LibreChat is vulnerable to Server-Side Request Forgery due to missing restrictions","id":"CVE-2025-69222","kev_date_added":null,"published":"2026-01-07"},{"cvss_score":9.1,"headline":"Path traversal in n/a","id":"CVE-2024-41704","kev_date_added":null,"published":"2024-07-22"},{"cvss_score":8.8,"headline":"Path Traversal in danny-avila/librechat","id":"CVE-2024-11170","kev_date_added":null,"published":"2025-03-20"},{"cvss_score":8.6,"headline":"LibreChat JSON Injection in Chat POST Allows Remote Resource Inclusion and PXSS via Image Upload","id":"CVE-2025-66450","kev_date_added":null,"published":"2025-12-11"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-03-31","vendors":["danny-avila"]},"summary":"Authenticated users can bypass SSRF protections to access internal network resources and cloud metadata services.","url":"https://insights.sbomify.com/CVE-2026-31943/"}