Cross-site Scripting (XSS) Affecting runfinch-finch package, versions <0:1.17.0-1.amzn2023.0.2


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.31% (23rd percentile)

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  • Snyk IDSNYK-AMZN2023-RUNFINCHFINCH-16887003
  • published27 May 2026
  • disclosed7 May 2026

Introduced: 7 May 2026

CVE-2026-39823  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 runfinch-finch to version 0:1.17.0-1.amzn2023.0.2 or higher.
This issue was patched in ALAS2023-2026-1741.

NVD Description

Note: Versions mentioned in the description apply only to the upstream runfinch-finch package and not the runfinch-finch package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

CVE-2026-27142 fixed a vulnerability in which URLs were not correctly escaped inside of a <meta> tag's <content> attribute. If the URL content were to insert ASCII whitespaces around the '=' rune inside of the <content> attribute, the escaper would fail to similarly escape it, leading to XSS.

CVSS Base Scores

version 3.1