CVE-2026-85021Public exploitNetwork attack vector

Unauthenticated browser script execution via unchecked redirect

Published Sep 3, 2026 · Updated Sep 3, 2026

DOM-based XSS in Dify 1.13.0 allows remote attackers to run script in a user's browser through a crafted redirect_url. Splash Layout passes the attacker-controlled redirect_url to router.replace without restricting the navigation target, permitting a script-bearing URL. The attacker needs no account, but a user must open the crafted link; successful exploitation changes content in that browser context.

CVSS severity4.3
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DOM-based XSS in Dify 1.13.0 allows remote attackers to run script in a user's browser through a crafted redirect_url. Splash Layout passes the attacker-controlled redirect_url to router.replace without restricting the navigation target, permitting a script-bearing URL. The attacker needs no account, but a user must open the crafted link; successful exploitation changes content in that browser context.

The record

CVE
CVE-2026-85021
Published
Sep 3, 2026
Updated
Sep 3, 2026
Vendor
LangGenius
Product
Dify
Classifications
CWE-79, CWE-94, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.13.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LangGenius · Difyversion=1.13.0

Published CVSS scores

4.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
4.3VulDBCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
5.3VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
5.0VulDBAV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-94Improper Control of Generation of Code ('Code Injection')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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