CVE-2026-102560
criticalA flaw was found in libsoup.
Vendor / product: Gnome — libsoup
A flaw was found in libsoup. When the permessage-deflate WebSocket extension compresses a very large outgoing message, truncated size calculations used for GByteArray growth could wrap, causing zlib to write past the allocated buffer and resulting in a heap buffer overflow.
CVSS
9.8
9.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-09-29 18:17
Modified: 2026-10-22 20:17
NVD status: Analyzed
Last synced 2 days ago
Verified against the source API 2026-10-27 07:07 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
gnome / libsoup <3.7.3
redhat / enterprise_linux 7.0, 8.0, 9.0, 10.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Patch / mitigation: https://access.redhat.com/security/cve/CVE-2026-102560
Patch / mitigation: https://bugzilla.redhat.com/show_bug.cgi?id=2543296
References
- https://access.redhat.com/errata/RHSA-2026:83384 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:83618 secalert@redhat.com
- https://access.redhat.com/security/cve/CVE-2026-102560 secalert@redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2543296 secalert@redhat.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 07:07 UTC · record ↗