What is CVE-2026-58520?

CVE-2026-58520 is a medium-severity vulnerability in MediaWiki, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2026-07-01.

How severe is CVE-2026-58520?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Open Redirect in MediaWiki

CVE-2026-58520

URL redirection to untrusted site ('open redirect') vulnerability in The Wikimedia Foundation Mediawiki - UrlShortener Extension allows Cross-Site Flashing. This issue affects Mediawiki - UrlShortener Extension: from * before 1.43.9, 1.44.6, 1.45.4.

Vulnerability class: Open Redirect

EPSS: 0.002 (7.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

c4f26cc8-17ff-4c99-b5e2-38fc1793eacc (Issue Tracking)
c4f26cc8-17ff-4c99-b5e2-38fc1793eacc (Issue Tracking)

Frequently asked questions

What is CVE-2026-58520?: CVE-2026-58520 is a medium-severity vulnerability in MediaWiki, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2026-07-01.
How severe is CVE-2026-58520?: Medium severity. CVSS v3 base score is 6.1 out of 10.