CVE-2026-102577

A flaw was found in Moodle. Incorrect handling of IPv4-mapped IPv6 addresses within the URL downloader's host-blocking logic allows an authenticated remote user to bypass blocked-host restrictions. By supplying a crafted URL, an attacker can induce the server to make requests to restricted destinations, leading to Server-Side Request Forgery (SSRF).

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-88779	Patch
https://access.redhat.com/security/cve/CVE-2026-102577	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2543604	Issue Tracking Third Party Advisory
https://moodle.org/mod/forum/discuss.php?d=482495	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:moodle:moodle::::::::
	cpe:2.3:a:moodle:moodle::::::::
	cpe:2.3:a:moodle:moodle::::::::
	cpe:2.3:a:moodle:moodle::::::::

History

01 Oct 2026, 14:14

Type	Values Removed	Values Added
References	~~() http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-88779 -~~	() http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-88779 - Patch
References	~~() https://access.redhat.com/security/cve/CVE-2026-102577 -~~	() https://access.redhat.com/security/cve/CVE-2026-102577 - Third Party Advisory
References	~~() https://bugzilla.redhat.com/show_bug.cgi?id=2543604 -~~	() https://bugzilla.redhat.com/show_bug.cgi?id=2543604 - Issue Tracking, Third Party Advisory
References	~~() https://moodle.org/mod/forum/discuss.php?d=482495 -~~	() https://moodle.org/mod/forum/discuss.php?d=482495 - Vendor Advisory
CPE		cpe:2.3:a:moodle:moodle::::::::
First Time		Moodle Moodle moodle

30 Sep 2026, 09:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-30 09:17

Updated : 2026-10-01 14:14

NVD link : CVE-2026-102577

Mitre link : CVE-2026-102577

CVE.ORG link : CVE-2026-102577

JSON object : View

Products Affected

moodle

moodle

CWE

CWE-918

Server-Side Request Forgery (SSRF)

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