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CVE-2026-31943: Server-Side Request Forgery (SSRF)

🗓️ 27 Mar 2026 00:00:00Reported by Rapid7Type 
rapid7
 rapid7
🔗 www.rapid7.com

Authenticated SSRF in LibreChat prior to 0.8.3 via failed IPv6-mapped IPv4 detection.

Related
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-31943
27 Mar 202619:21
–attackerkb
circl
Circl
CVE-2026-31943
27 Mar 202621:01
–circl
cnnvd
CNNVD
LibreChat 代码问题漏洞
27 Mar 202600:00
–cnnvd
cve
CVE
CVE-2026-31943
27 Mar 202619:21
–cve
cvelist
Cvelist
CVE-2026-31943 LibreChat has SSRF protection bypass via IPv4-mapped IPv6 normalization in isPrivateIP
27 Mar 202619:21
–cvelist
euvd
EUVD
EUVD-2026-16764
27 Mar 202619:21
–euvd
nvd
NVD
CVE-2026-31943
27 Mar 202620:16
–nvd
ptsecurity
Positive Technologies
PT-2026-28429
27 Mar 202600:00
–ptsecurity
redhatcve
RedhatCVE
CVE-2026-31943
28 Mar 202623:09
–redhatcve
vulnrichment
Vulnrichment
CVE-2026-31943 LibreChat has SSRF protection bypass via IPv4-mapped IPv6 normalization in isPrivateIP
27 Mar 202619:21
–vulnrichment

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31 Mar 2026 00:00Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.18.5
EPSS0.00302
SSVC
0