Dashboard / CVE-2026-102559

CVE-2026-102559

HIGH
MEDIUM Priority: 0.03 BB Relevance: 77/100
Published: 2026-09-29 Modified: 2026-10-29 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: Low
I: Low
A: High

Description

A flaw was found in libsoup. When constructing a masked WebSocket client frame for a very large outgoing payload, size values passed to GByteArray allocation APIs could be truncated while the masking routine still used the full length, causing a heap buffer overflow.

Weakness Classification (1)

Affected Software (5)

VendorProductVersion
gnome libsoup < 3.7.3
redhat enterprise_linux 7.0
redhat enterprise_linux 8.0
redhat enterprise_linux 9.0
redhat enterprise_linux 10.0

References & Advisories (6)

https://access.redhat.com/errata/RHSA-2026:83384
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:83618
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:84586
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:92347
vendor-advisory x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2543285
issue-tracking x_refsource_REDHAT

Bug Bounty Relevance

77 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

8.6 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

EPSS — Exploitation Probability

0.40%
Raw Score 0.004040
Percentile 34.6%
Date 2026-10-29

Intelligence Sources

mitre ref →
nvd ref →

External Links