Allocation of Resources Without Limits or Throttling Affecting libsoup3-doc package, versions <0:3.6.6-59.amzn2023


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.47% (40th percentile)

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  • Snyk IDSNYK-AMZN2023-LIBSOUP3DOC-19472320
  • published1 Sept 2026
  • disclosed14 Jul 2026

Introduced: 14 Jul 2026

CVE-2026-15711  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 libsoup3-doc to version 0:3.6.6-59.amzn2023 or higher.
This issue was patched in ALAS2023-2026-2087.

NVD Description

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

A vulnerability was found in libsoup's WebSocket frame parsing implementation. The library fails to validate length rules specified in RFC 6455 §5.5, which mandates that all WebSocket control frames (e.g., PING, PONG, CLOSE) contain a payload of 125 bytes or less. A remote, unauthenticated attacker can exploit this by sending a non-compliant, oversized control frame. Because the parser handles this protocol violation improperly instead of throwing an immediate connection termination error, it triggers a internal processing crash, resulting in a remote denial of service (DoS) for applications utilizing libsoup WebSockets.

CVSS Base Scores

version 3.1