CVE-2026-31943
LibreChat is a ChatGPT clone with additional features.
Published Mar 27, 2026 · updated Jun 17, 2026 · librechat librechat
LibreChat is a ChatGPT clone with additional features. Prior to version 0.8.3, in 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 ), loopback, and RFC1918 ranges. Version 0.8.3 fixes the issue.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Mar 27, 2026 · NIST NVD
Detected
LibreChat is a ChatGPT clone with additional features. Prior to version 0.8.3, in 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 ), loopback, and RFC1918 ranges. Version 0.8.3 fixes the issue.
Jun 17, 2026 · NIST NVD
Updated
LibreChat is a ChatGPT clone with additional features. Prior to version 0.8.3, in 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 ), loopback, and RFC1918 ranges. Version 0.8.3 fixes the issue.
Affected
- cpe librechat/librechatversion unspecified
- cpe librechat/librechat0.8.3
Sources
- CVE.orgVulnerability recordCVE-2026-31943
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-2026-31943
LibreChat is a ChatGPT clone with additional features. Prior to version 0.8.3, in fails to detect IPv4-mapped IPv6 addresses in their hex-normalized form, allowing any authenticated user to bypass SSRF protection and make the serv
nvd.nist.gov