RCE in Langgenius Dify
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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.005 (41.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001
Affected products
- Langgenius Dify — versions 1.13.0
Weakness classification (CWE)
References
- gist.github.com/TrebledJ/0e8466e5c39a6fb7dca8a3acdfbe2ddc (exploit)
- github.com/langgenius/dify/ (product)
- github.com/langgenius/dify/security/advisories/GHSA-7qgm-pqv4-668x (broken-link)
- huntr.com/bounties/8ff349b3-db5f-4b56-9ccf-a19abd96e30f (related)
- vuldb.com/cve/CVE-2026-85021 (third-party-advisory)
- vuldb.com/submit/880601 (third-party-advisory)
- vuldb.com/vuln/398288 (technical-description, vdb-entry)
- vuldb.com/vuln/398288/cti (signature, permissions-required)
Frequently asked questions
- What is CVE-2026-85021?
- CVE-2026-85021 is a medium-severity vulnerability in Langgenius Dify, 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.