Information Exposure Affecting libsoup3-devel package, versions <0:3.7.2-1.amzn2023


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.25% (15th percentile)

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  • Snyk IDSNYK-AMZN2023-LIBSOUP3DEVEL-20249270
  • published29 Sept 2026
  • disclosed24 Jul 2026

Introduced: 24 Jul 2026

CVE-2026-66339  (opens in a new tab)
CWE-201  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 libsoup3-devel to version 0:3.7.2-1.amzn2023 or higher.
This issue was patched in ALAS2023-2026-3144.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libsoup3-devel package and not the libsoup3-devel package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

A flaw was found in libsoup. After a CONNECT tunnel is established through an HTTP proxy, libsoup incorrectly attaches the Proxy-Authorization header to subsequent HTTPS requests sent through that tunnel to the destination server. This allows the destination server to capture proxy credentials, leading to information disclosure.

CVSS Base Scores

version 3.1