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.
CVSS
- Base score
- 9.3
- Version
- 4.0
- 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
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days
- 0.54 %
- Percentile among all scored CVEs
- 44
- Score date
- 10/20/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
ATT&CK techniques
How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.
- Exploitation
T1190Exploit Public-Facing Applicationinitial access90 %
Vector AV:N/PR:N/UI:N y la descripción indica acceso no autenticado a recursos protegidos al coincidir la ruta con la de login; el impacto es una elusión de autorización, no una credencial real.
Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.
ATT&CK mitigations that cover these techniques
Affected technologies (1)
⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.
CWEs
- CWE-288, CWE-863
References
Raw JSON (NVD)
Show
{
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"value": "An unauthenticated client may access certain protected resources when using EthereumAuthenticator if the request path contains the configured login path.\n\n\n\nThis 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.\n\n\n\nExploitation requires the protected resource path to contain the configured login path as a later segment. Explicitly FORBIDDEN routes are not affected."
}
],
"lastModified": "2026-10-15T14:41:34.110",
"sourceIdentifier": "emo@eclipse.org"
}