CVE-2026-102556 — Vulnerability intelligence

gnome — libsoup

Published: 2026-09-29T16:11:50.609Z

CVSS

8.6

CISA KEV

Not listed; not proof of no exploitation

Original source text (not a translation)

A flaw was found in libsoup. When handling an incoming WebSocket Pong frame, SoupWebsocketConnection emitted the ::pong signal with a GByteArray pointer even though the signal is declared to pass a GBytes. Applications connecting a handler that follows the documented GBytes API can trigger heap corruption or a crash upon receiving a crafted Pong.

Sources

• CVE-2026-102556
• Vendor Advisory
• Original advisory
• Original advisory
• Original advisory
• Original advisory
• Original advisory
• Original advisory
• Original advisory
• Original advisory
• Mitigation, Vendor Advisory
• Issue Tracking, Vendor Advisory
• CVE-2026-102556
• Original advisory
• Original advisory