Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-102586

CVE-2026-102586MEDIUM

Moodle: xss via password reset link due to insufficient username escaping

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   R  C  L  L  N    6.1   .0028   18.2     —

AFFECTED
  Product  Versions  Fixed
  moodle   5.2.0 –   —

TIMELINE
  Sep 29  Reserved by fedora
  Sep 30  Published (CNA: fedora)
  Oct 1   RESCORED — CVE-2026-102586 (moodle). CVSS 4.3 → 6.1 (NVD).

CWE-79 · CNA: fedora · CVSS v3.1 · 4 references · NVD status: Analyzed

Description

A flaw was found in Moodle. Insufficient sanitization of username input on the password reset page allows a remote attacker to conduct a cross-site scripting (XSS) attack. By convincing an unauthenticated user to access a specially crafted password reset link, an attacker could execute arbitrary script in the victim's browser.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
September 29, 2026	Reserved	Reserved by fedora
September 30, 2026	Published	Published (CNA: fedora)
October 1, 2026	RESCORED	RESCORED — CVE-2026-102586 (moodle). CVSS 4.3 → 6.1 (NVD).

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
—	moodle	—	5.2.0	—

Weaknesses

CWE-79

References (4)

http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-88335 [Patch]
https://access.redhat.com/security/cve/CVE-2026-102586 [Third Party Advisory]
https://bugzilla.redhat.com/show_bug.cgi?id=2543641 [Issue Tracking, Third Party Advisory]
https://moodle.org/mod/forum/discuss.php?d=482504 [Vendor Advisory]

Authoritative record: CVE-2026-102586 at cve.org

Weaknesses: CWE-79

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-102586 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.