Information Exposure Affecting libsoup-debuginfo package, versions <0:2.56.0-6.amzn2.0.9


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.25% (15th percentile)

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  • Snyk IDSNYK-AMZN2-LIBSOUPDEBUGINFO-20847642
  • published13 Oct 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:2 libsoup-debuginfo to version 0:2.56.0-6.amzn2.0.9 or higher.
This issue was patched in ALAS2-2026-3970.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libsoup-debuginfo package and not the libsoup-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 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