Out-of-bounds Read Affecting libsoup-devel package, versions <0:2.72.0-6.amzn2023.0.16


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.25% (15th percentile)

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  • Snyk IDSNYK-AMZN2023-LIBSOUPDEVEL-20874328
  • published13 Oct 2026
  • disclosed24 Jul 2026

Introduced: 24 Jul 2026

CVE-2026-66337  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 libsoup-devel to version 0:2.72.0-6.amzn2023.0.16 or higher.
This issue was patched in ALAS2023-2026-3212.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libsoup-devel package and not the libsoup-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. An unsigned integer underflow in the soup_filter_input_stream_read_until() function causes a heap buffer over-read when parsing multipart HTTP responses. A malicious HTTP server can exploit this by sending a crafted multipart response, potentially causing the client application to crash or disclose sensitive heap memory.

CVSS Base Scores

version 3.1