High severity8.6NVD Advisory· Published Sep 29, 2026· Updated Sep 29, 2026

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.

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References

access.redhat.com/security/cve/CVE-2026-102556nvd
bugzilla.redhat.com/show_bug.cginvd

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