CVE-2026-12548

A heap out-of-bounds read flaw was found in libsoup. When parsing multipart HTTP messages, an integer type mismatch between the caller and soup_headers_parse() can cause the length parameter to be incorrectly truncated, leading to a heap buffer over-read. A remote attacker could use this flaw to crash an application using libsoup or potentially disclose heap memory contents.

CVSS v3 4.2 MEDIUM

4.2^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-12548	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2489996	Exploit Issue Tracking Vendor Advisory
https://gitlab.gnome.org/GNOME/libsoup/-/work_items/512	Exploit Mitigation Vendor Advisory
https://gitlab.gnome.org/GNOME/libsoup/-/work_items/512	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:gnome:libsoup:-:::::::*
	cpe:2.3:o:redhat:enterprise_linux:10.0:::::::*

History

No history.

Information

Published : 2026-07-21 19:17

Updated : 2026-08-24 16:45

NVD link : CVE-2026-12548

Mitre link : CVE-2026-12548

CVE.ORG link : CVE-2026-12548

JSON object : View

Products Affected

redhat

enterprise_linux

gnome

libsoup

CWE

CWE-125

Out-of-bounds Read

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