CVEvulnerability

CVE-2026-85534

5.9 MEDIUM Published 2026-09-04 Modified 2026-09-08 Official page ↗
Status
Awaiting Analysis
Published
2026-09-04
Last modified
2026-09-08
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-617

Description

A flaw was found in libsoup. When a client sends an HTTP/2 request body from a non-pollable input stream, the library can buffer more data than the current flow-control window later allows. A malicious HTTP/2 server can shrink SETTINGS_INITIAL_WINDOW_SIZE while that buffered read is still in progress. The client then copies the full buffer into a smaller DATA callback without a runtime bounds check, which can abort the process or fail the HTTP/2 session.

Related

Weakness · CWE (1)

  • CWE-617 Reachable Assertion weakness

References