CVE-2026-102555

A flaw was found in libsoup. The soup_uri_decode_data_uri() function incorrectly treated base64 data-URI payloads as NUL-terminated strings when calling g_base64_decode_inplace(). If the percent-decoded payload contained embedded NUL bytes, the decoded length could remain uninitialized and be used as the size of the returned GBytes. This can lead to an out-of-bounds read or application crash when processing a crafted data URI.

CVSS v3 8.2 HIGH

8.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:83618
https://access.redhat.com/security/cve/CVE-2026-102555	Mitigation Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2543224	Issue Tracking Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:gnome:libsoup::::::::
	cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:10.0:::::::*

History

15 Oct 2026, 17:17

Type	Values Removed	Values Added
References		() https://access.redhat.com/errata/RHSA-2026:83618 -

15 Oct 2026, 13:28

Type	Values Removed	Values Added
First Time		Gnome libsoup Redhat Gnome Redhat enterprise Linux
CPE		cpe:2.3:a:gnome:libsoup:::::::: cpe:2.3:o:redhat:enterprise_linux:10.0:::::::* cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*
References	~~() https://access.redhat.com/security/cve/CVE-2026-102555 -~~	() https://access.redhat.com/security/cve/CVE-2026-102555 - Mitigation, Vendor Advisory
References	~~() https://bugzilla.redhat.com/show_bug.cgi?id=2543224 -~~	() https://bugzilla.redhat.com/show_bug.cgi?id=2543224 - Issue Tracking, Vendor Advisory

29 Sep 2026, 18:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-29 18:17

Updated : 2026-10-15 17:17

NVD link : CVE-2026-102555

Mitre link : CVE-2026-102555

CVE.ORG link : CVE-2026-102555

JSON object : View

Products Affected

redhat

enterprise_linux

gnome

libsoup

CWE

CWE-125

Out-of-bounds Read

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