Out-of-bounds Read Affecting libsoup3 package, versions <3.6.6-1+e10


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.4% (34th percentile)

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  • Snyk IDSNYK-ECHOLATEST-LIBSOUP3-20335136
  • published30 Sept 2026
  • disclosed29 Sept 2026

Introduced: 29 Sep 2026

NewCVE-2026-102559  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Echo:latest libsoup3 to version 3.6.6-1+e10 or higher.

NVD Description

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

A flaw was found in libsoup. When constructing a masked WebSocket client frame for a very large outgoing payload, size values passed to GByteArray allocation APIs could be truncated while the masking routine still used the full length, causing a heap buffer overflow.

CVSS Base Scores

version 3.1