Is CVE-2026-102556 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-102556?

CVE-2026-102556 has a CVSS v3 severity of HIGH (8.6).

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CVE-2026-102556

Description

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.