CRITICALCVSS v4 9.3Vulnerability

CVE-2026-19863

An unauthenticated client may access certain protected resources when using EthereumAuthenticator if the request path contains the configured login path. This is caused by the authenticator using an unanchored substring match when identifying the login page. If the login path appears later within a protected request path, the request may be treated as the login page and its authentication or role requirement replaced with ALLOWED. Exploitation requires the protected resource path to contain the configured login path as a later segment. Explicitly FORBIDDEN routes are not affected.

Properties

Severity
CRITICAL
Nvd fetched at
2026-10-20T21:14:08.448323+00:00
Cvss severity
CRITICAL
Cvss score
9.3
Epss score
0.0054
Retrieved at
2026-10-21T01:24:49+00:00
Last source
FIRST EPSS
Cvss version
4.0
Score
9.3
Cve id
CVE-2026-19863
Cvss vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
First seen by Signal
2026-10-18T13:39:03+00:00
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published at
2026-10-15T10:17:12.497
Last modified
2026-10-15T14:41:34.110
Epss percentile
0.44372

Related Entities (2)

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CVE-2026-19863 (CVSS v4 9.3) — Ninja Signal Threat Intelligence | Ninja Signal