Bug 2543604 (CVE-2026-102577) - CVE-2026-102577 moodle: SSRF risk in URL downloader via IPv4-mapped IPv6 address bypass
Summary: CVE-2026-102577 moodle: SSRF risk in URL downloader via IPv4-mapped IPv6 addr...
Keywords:
Status: NEW
Alias: CVE-2026-102577
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2543833
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-29 20:24 UTC by OSIDB Bzimport
Modified: 2026-09-30 08:45 UTC (History)
0 users

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Description OSIDB Bzimport 2026-09-29 20:24:01 UTC 
A flaw was found in Moodle's URL downloader. Incorrect handling of IPv4-mapped IPv6 addresses in the host-blocking logic allows an authenticated user to bypass some blocked-host restrictions, resulting in a server-side request forgery (SSRF) risk when the downloader fetches a crafted URL. No further impact beyond partial blocklist bypass has been demonstrated.
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