---
title: "CVE-2026-19863: EthereumAuthenticator - Authentication Bypass"
description: "EthereumAuthenticator contains an authentication bypass caused by unanchored substring matching of the login path, letting unauthenticated clients access protected resources, exploit requires the protected path to contain the login path as a later segment."
url: https://panop.io/threat-heartbeat/CVE-2026-19863/
---

# CVE-2026-19863 EthereumAuthenticator - Authentication Bypass

EthereumAuthenticator contains an authentication bypass caused by unanchored substring matching of the login path, letting unauthenticated clients access protected resources, exploit requires the protected path to contain the login path as a later segment.

CVSS base score 9.3 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-19863)

## Details

Type

Authentication Bypass

Impact

Broken Authentication

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

Published

15 October 2026

Updated

15 October 2026

Weakness

[CWE-288](https://cwe.mitre.org/data/definitions/288.html)

## Vendor fix

Update to the latest version with fixed login path matching logic.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-19863](https://nvd.nist.gov/vuln/detail/CVE-2026-19863)
- [https://gitlab.eclipse.org/security/cve-assignment/-/work\_items/230](https://gitlab.eclipse.org/security/cve-assignment/-/work_items/230)
- [https://github.com/jetty/jetty.project/security/advisories/GHSA-6m7j-pjmp-crgq](https://github.com/jetty/jetty.project/security/advisories/GHSA-6m7j-pjmp-crgq)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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