What is CVE-2026-102577?

CVE-2026-102577 is a medium-severity vulnerability, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.3/10. Published 2026-09-30.

How severe is CVE-2026-102577?

Medium severity. CVSS v3 base score is 4.3 out of 10.

CVE-2026-102577

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).

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2026-09-30.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

git.moodle.org/gw
access.redhat.com/security/cve/CVE-2026-102577 (vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking)
moodle.org/mod/forum/discuss.php

Frequently asked questions

What is CVE-2026-102577?: CVE-2026-102577 is a medium-severity vulnerability, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.3/10. Published 2026-09-30.
How severe is CVE-2026-102577?: Medium severity. CVSS v3 base score is 4.3 out of 10.