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8.6 High

A flaw was found in libsoup.

CVE-2026-102560

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.

Assessment

CVSS
8.6 (v3.1)
Severity
High
EPSS
0.42% chance of exploitation in the next 30 days
Known exploited
Not listed in CISA KEV
Exploit availability
Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published
29 September 2026
Last updated
2 November 2026
Assigner
redhat

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

At the source

References

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