CVE-2026-102577
mediumA flaw was found in Moodle.
Vendor / product: Moodle — moodle
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
4.3
4.3 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Severity source: NVD CVSS v3.1 (patrick@puiterwijk.org)
Timeline (UTC)
Published: 2026-09-30 09:17
Modified: 2026-10-01 14:14
NVD status: Analyzed
Last synced 3 days ago
Verified against the source API 2026-10-27 06:56 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
moodle / moodle <4.5.13, ≥5.0.0 <5.0.9, ≥5.1.0 <5.1.6, ≥5.2.0 <5.2.2
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://moodle.org/mod/forum/discuss.php?d=482495
Patch / mitigation: http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-88779
References
- http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-88779 patrick@puiterwijk.org
- https://access.redhat.com/security/cve/CVE-2026-102577 patrick@puiterwijk.org
- https://bugzilla.redhat.com/show_bug.cgi?id=2543604 patrick@puiterwijk.org
- https://moodle.org/mod/forum/discuss.php?d=482495 patrick@puiterwijk.org
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:56 UTC · record ↗