CVE-2026-31943
- Source
- https://cve.org/CVERecord?id=CVE-2026-31943
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31943.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-31943
- Aliases
-
- GHSA-w5r7-4f94-vp4c
- Published
- 2026-03-27T19:21:50.653Z
- Modified
- 2026-07-15T02:18:56.896098177Z
- Severity
-
- 8.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N CVSS Calculator
- Summary
- LibreChat has SSRF protection bypass via IPv4-mapped IPv6 normalization in isPrivateIP
- Details
-
LibreChat is a ChatGPT clone with additional features. Prior to version 0.8.3,
isPrivateIP()inpackages/api/src/auth/domain.tsfails 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., AWS169.254.169.254), loopback, and RFC1918 ranges. Version 0.8.3 fixes the issue. - Database specific
{ "cna_assigner": "GitHub_M", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31943.json", "cwe_ids": [ "CWE-918" ] }- References
Affected packages
Git / github.com/danny-avila/librechat
Affected ranges
- Type
- GIT
- Repo
- https://github.com/danny-avila/librechat
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedIntroducedLast affected
- Database specific
{ "cpe": [ "cpe:2.3:a:librechat:librechat:*:*:*:*:*:*:*:*", "cpe:2.3:a:librechat:librechat:0.8.3:rc1:*:*:*:*:*:*", "cpe:2.3:a:librechat:librechat:0.8.3:rc2:*:*:*:*:*:*" ], "source": [ "CPE_RANGE", "CPE_STRING" ], "extracted_events": [ { "introduced": "0" }, { "fixed": "0.8.3" }, { "introduced": "0.8.3-rc1" }, { "last_affected": "0.8.3-rc1" }, { "introduced": "0.8.3-rc2" }, { "last_affected": "0.8.3-rc2" } ] }