CVE-2026-102559
Last modified
CVE-2026-102559 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. 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.. EPSS estimates a 0.63% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| 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
- https://access.redhat.com/errata/RHSA-2026:83384Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:83618Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2026-102559Mitigation, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2543285Issue Tracking, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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