Improper Validation of Unsafe Equivalence in Input 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
0.37% (29th percentile)

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  • Snyk IDSNYK-AMZN2023-RUNFINCHFINCH-16885874
  • published27 May 2026
  • disclosed7 May 2026

Introduced: 7 May 2026

CVE-2026-39826  (opens in a new tab)
CWE-1289  (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.

If a trusted template author were to write a <script> tag containing an empty 'type' attribute or a 'type' attribute with an ASCII whitespace, the execution of the template would incorrectly escape any data passed into the <script> block.

CVSS Base Scores

version 3.1