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CVE-2026-31951

🗓️ 27 Mar 2026 19:29:25Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 6 Views

LibreChat MCP header injection enables OAuth token theft via credential placeholder substitution.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-31951
27 Mar 202619:29
attackerkb
CNNVD
LibreChat 信息泄露漏洞
27 Mar 202600:00
cnnvd
Cvelist
CVE-2026-31951 LibreChat's MCP Server Header Injection Enables OAuth Token Theft
27 Mar 202619:29
cvelist
EUVD
EUVD-2026-16769
27 Mar 202619:29
euvd
NVD
CVE-2026-31951
27 Mar 202620:16
nvd
OSV
CVE-2026-31951 LibreChat's MCP Server Header Injection Enables OAuth Token Theft
27 Mar 202619:29
osv
Positive Technologies
PT-2026-28432
27 Mar 202600:00
ptsecurity
RedhatCVE
CVE-2026-31951
28 Mar 202623:09
redhatcve
Vulnrichment
CVE-2026-31951 LibreChat's MCP Server Header Injection Enables OAuth Token Theft
27 Mar 202619:29
vulnrichment
NVD
Vulners
Node
librechatlibrechatRange0.8.20.8.3
OR
librechatlibrechatMatch0.8.3rc1
[
  {
    "vendor": "danny-avila",
    "product": "LibreChat",
    "versions": [
      {
        "version": ">= v0.8.2-rc1, <= v0.8.3-rc1",
        "status": "affected"
      }
    ]
  }
]

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17 Jun 2026 10:34Current
6Medium risk
Vulners AI Score6
CVSS 3.15.7 - 6.8
EPSS0.00244
SSVC
6