Quick answers
- Is CVE-2026-85197 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-85197 being exploited in the wild.
- How severe is CVE-2026-85197?
- High severity, with a CVSS score of 7.6, published 4 September 2026.
- Which products and versions are affected?
- Gnome Libsoup <unknown.
- Is there a fix for CVE-2026-85197?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-85197 attacked?
- It is attacked over the network or from the adjacent network.
- Am I affected by CVE-2026-85197?
- Check whether you run Gnome Libsoup at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A heap use-after-free vulnerability exists in libsoup's HTTP/2 client implementation within the on_data_read() function. The flaw is triggered when a server sends a GOAWAY frame while the HTTP/2 client is asynchronously reading a file body during upload. This results in memory being freed and subsequently accessed, causing memory corruption. An attacker controlling an HTTP/2 server or performing a man-in-the-middle (MITM) attack on the network can exploit this condition to achieve information disclosure or arbitrary code execution. A patch is available in libsoup3 as of September 2026.
Affected products
- GNOME libsoup <unknown
Timeline
- 2026-09-04: disclosed
- 2026-09-16: advisory: Red Hat RHSA-2026:68235 issued for libsoup3 in Red Hat Enterprise Linux 10