Is there a public exploit for CVE-2026-102557?

No public exploit for CVE-2026-102557 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-102557?

CVE-2026-102557 scores CVSS 8.6 (v3.1), rated high. EPSS puts the chance of exploitation in the next 30 days at 0.28%.

What does CVE-2026-102557 affect?

CVE-2026-102557 affects Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9.6 Extended Update Support, Red Hat Enterprise Linux 8.8 Telecommunications Update Service, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support.

8.6 High

A flaw was found in libsoup.

CVE-2026-102557

A flaw was found in libsoup. When reassembling fragmented WebSocket messages into a GByteArray, libsoup did not adequately cap total message size against the limits of the underlying buffer type. A remote peer could send fragments that caused size truncation while the implementation still used the full length, leading to heap corruption or a crash.

Assessment

CVSS: 8.6 (v3.1)
Severity: High
EPSS: 0.28% 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
Affected: Red Hat · Red Hat Enterprise Linux 10 · Red Hat Enterprise Linux 10.0 Extended Update Support · Red Hat Enterprise Linux 7 Extended Lifecycle Support · Red Hat Enterprise Linux 8
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

EUVD (ENISA)

References

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