CVE-2026-102557 — Vulnerability intelligence

gnome — libsoup

Published: 2026-09-29T16:11:57.871Z

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 reassembling fragmented WebSocket messages into a GByteArray, libsoup did not adequately cap total message size against the limits of the underlying buffer type. A remote peer could send fragments that caused size truncation while the implementation still used the full length, leading to heap corruption or a crash.

Sources

• CVE-2026-102557
• 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-2026-102557
• Original advisory
• Original advisory