CVE-2026-102560
High
Description
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.
SeverityHigh
CVSS8.6
Exploit probability—
Product
Gnome Libsoup
PublishedSep 29, 2026
First seenSep 29, 2026
Weakness typeCWE-125Out-of-bounds read
How to fix
Update
- gnome libsoup3.7.3 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gnome libsoup | v < 3.7.3 | 3.7.3 |
| redhat enterprise_linux | 7.0, 8.0, 9.0, 10.0 | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.