---
title: "CVE-2026-118690: Signal K Server - Authentication Bypass"
description: "Signal K Server < 2.33.0 contains a missing authentication vulnerability caused by unauthenticated access to /skServer/ziplogs endpoint, letting remote attackers download log archives and forge admin tokens, exploit requires no authentication."
url: https://panop.io/threat-heartbeat/CVE-2026-118690/
---

# CVE-2026-118690 Signal K Server - Authentication Bypass

Signal K Server < 2.33.0 contains a missing authentication vulnerability caused by unauthenticated access to /skServer/ziplogs endpoint, letting remote attackers download log archives and forge admin tokens, exploit requires no authentication.

CVSS base score 9.8 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-118690)

## Details

Type

Authentication Bypass

Impact

Privilege Escalation

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

28 October 2026

Updated

29 October 2026

Weakness

[CWE-306](https://cwe.mitre.org/data/definitions/306.html)

## Vendor fix

Update to version 2.33.0 or later.

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-2026-118690](https://nvd.nist.gov/vuln/detail/CVE-2026-118690)
- [https://github.com/SignalK/signalk-server](https://github.com/SignalK/signalk-server)
- [https://github.com/SignalK/signalk-server/blob/v2.32.0/src/interfaces/logfiles.js#L30-L91](https://github.com/SignalK/signalk-server/blob/v2.32.0/src/interfaces/logfiles.js#L30-L91)
- [https://github.com/SignalK/signalk-server/commit/728bab82742d16c54e50525b95dc9b6e32396107](https://github.com/SignalK/signalk-server/commit/728bab82742d16c54e50525b95dc9b6e32396107)
- [https://github.com/SignalK/signalk-server/releases/tag/v2.33.0](https://github.com/SignalK/signalk-server/releases/tag/v2.33.0)
- [https://github.com/SignalK/signalk-server/security/advisories/GHSA-4w32-qx5g-cpwv](https://github.com/SignalK/signalk-server/security/advisories/GHSA-4w32-qx5g-cpwv)
- [https://www.vulncheck.com/advisories/signal-k-server-before-2.33.0-missing-authentication-via-skserver-ziplogs](https://www.vulncheck.com/advisories/signal-k-server-before-2.33.0-missing-authentication-via-skserver-ziplogs)

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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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