PT-2026-58678 · Libsoup · Libsoup

Published 2026-07-14 · Updated 2026-07-14 · CVE-2026-15712

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Medium

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions libsoup versions 3.0 through 3.7.0

Description A heap buffer over-read occurs in the HTTP/2 connection tracking framework when processing an HTTP/2 GOAWAY frame. The issue arises because the library assumes the Additional Debug Data payload is a NUL-terminated C-string and fails to perform strict length-boundary verification. A remote, unauthenticated attacker can send a malformed GOAWAY frame without the null delimiter, causing the library to read beyond the allocated buffer. This can lead to an application crash resulting in a denial of service (DoS) or the exposure of memory fragments.

Recommendations Update libsoup to a version later than 3.7.0.

Exploit

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-15712

Affected Products

Libsoup

References · 4

• 🔥 https://gitlab.gnome.org/GNOME/libsoup/-/work_items/540 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-15712 · Security Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2499939 · Note
• https://access.redhat.com/security/cve/CVE-2026-15712 · Note