CVE-2026-102577

mediumpriority · track · 0EPSS 0.002 · 15 %ileUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.25% (15th) EPSS

CVSS 4.3 · medium

Is it mine?

8 products

Check your exposure

Who says so?

2 sources

nvd · osv

EPSS · scored 2026-10-22

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

Technical severity, 0–10. One row per scoring source.

4.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:Nsecondary · patrick@puiterwijk.orgexploitability 2.8 · impact 1.4

v3.14mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-918US

affected products (8)

Products and version ranges known to be affected.

moodle moodle< 4.5.13nvdUScpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
moodle moodle5.0.0 → 5.0.9nvdUScpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
moodle moodle5.1.0 → 5.1.6nvdUScpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
moodle moodle5.2.0 → 5.2.2nvdUScpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
Bitnami moodle< 4.5.13osvUSpkg:bitnami/moodle
Bitnami moodle5.0.0 → 5.0.9osvUSpkg:bitnami/moodle
Bitnami moodle5.1.0 → 5.1.6osvUSpkg:bitnami/moodle
Bitnami moodle5.2.0 → 5.2.2osvUSpkg:bitnami/moodle

advisories (1)

Vendor and ecosystem advisories describing this.

BIT-moodle-2026-102577Moodle: ssrf risk in url downloader via ipv4-mapped ipv6 address bypass2026-10-05vendor · osvUS
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).

sources

Which sources assert this record, and when.

nvd osv NVD CVE.org MITRE

published 2026-09-30modified 2026-10-01

references (4) nvd

External citations — patches, advisories, analysis.

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

scry

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