CVE-2026-15711

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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-15711
https://bugzilla.redhat.com/show_bug.cgi?id=2499924
https://gitlab.gnome.org/GNOME/libsoup/-/issues/515
https://gitlab.gnome.org/GNOME/libsoup/-/issues/515

Configurations

No configuration.

History

15 Jul 2026, 15:16

Type	Values Removed	Values Added
References	~~() https://gitlab.gnome.org/GNOME/libsoup/-/issues/515 -~~	() https://gitlab.gnome.org/GNOME/libsoup/-/issues/515 -

14 Jul 2026, 20:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-14 20:16

Updated : 2026-07-15 18:20

NVD link : CVE-2026-15711

Mitre link : CVE-2026-15711

CVE.ORG link : CVE-2026-15711

JSON object : View

Products Affected

No product.

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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