What is CVE-2026-85021?

CVE-2026-85021 is a medium-severity vulnerability, classified under Cross-site Scripting. CVSS score: 4.3/10. Published 2026-09-03.

How severe is CVE-2026-85021?

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

CVE-2026-85021

CVE-2026-85021

A vulnerability was determined in langgenius dify 1.13.0. Affected is the function router.replace of the file web/app/(shareLayout)/components/splash.tsx of the component Splash Layout. This manipulation of the argument redirect_url causes cross site scripting. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.004 (29.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

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

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-85021?: CVE-2026-85021 is a medium-severity vulnerability, classified under Cross-site Scripting. CVSS score: 4.3/10. Published 2026-09-03.
How severe is CVE-2026-85021?: Medium severity. CVSS v3 base score is 4.3 out of 10.