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Vulnerability record · CVE-2026-85197 · published 4 September 2026

CVE-2026-85197: Use after free vulnerability

A flaw was found in libsoup. A malicious HTTP/2 server or a Man-in-the-Middle (MITM) attacker can exploit a heap use-after-free vulnerability in the HTTP/2 client implementation. This occurs when a GNOME application uploads a file using HTTP/2, and the server sends a GOAWAY frame while the file body is being read asynchronously. This can lead to memory corruption, potentially resulting in information disclosure or arbitrary code execution.

7.6 CVSS 3.1 High EPSS 0.27% · top 82.9% CWE-416 · Use after free Awaiting Analysis
7.6CVSS 3.1 base score
0.27%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
16 Sep 2026Last modified by NVD

Description

A flaw was found in libsoup. A malicious HTTP/2 server or a Man-in-the-Middle (MITM) attacker can exploit a heap use-after-free vulnerability in the HTTP/2 client implementation. This occurs when a GNOME application uploads a file using HTTP/2, and the server sends a GOAWAY frame while the file body is being read asynchronously. This can lead to memory corruption, potentially resulting in information disclosure or arbitrary code execution.

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

References

LinkTags
https://access.redhat.com/errata/RHSA-2026:68235
https://access.redhat.com/security/cve/CVE-2026-85197
https://bugzilla.redhat.com/show_bug.cgi?id=2528425
https://gitlab.gnome.org/GNOME/libsoup/-/work_items/552
https://gitlab.gnome.org/GNOME/libsoup/-/work_items/552

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-85197), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.