Cross-site Scripting (XSS) Affecting gatus-fips package, versions <5.35.0-r9


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.31% (21st percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-GATUSFIPS-16479523
  • published7 May 2026
  • disclosed11 May 2026

Introduced: 7 May 2026

CVE-2026-42554  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade Chainguard gatus-fips to version 5.35.0-r9 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gatus-fips package and not the gatus-fips package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

Fiber is a web framework for Go. Prior to 2.52.12 and 3.1.0, Cross-Site Scripting vulnerability in Go Fiber allows a remote attacker to inject arbitrary HTML/JavaScript by supplying Accept: text/html on any request whose handler passes attacker-influenced data to the AutoFormat() feature. The developer opts into content negotiation by calling AutoFormat(), but does not opt into raw HTML emission for a particular request; Fiber chooses that branch from attacker-controlled Accept. The html branch is the sole outlier in a method whose name (AutoFormat) and symmetrical structure actively telegraph "safe, format-agnostic reply." This vulnerability is fixed in 2.52.12 and 3.1.0.

CVSS Base Scores

version 3.1