CVE-2026-18266Network attack vector

Information disclosure via unchecked post-login redirect

Published Jul 29, 2026 · Updated Jul 29, 2026

Open redirect in LangGenius Dify 1.11.4 allows remote attackers to disclose sensitive information through a crafted post-login URL. Post-login handlers use the unvalidated redirect_url value as a navigation target, accepting external domains, protocol-relative URLs, userinfo, nonstandard ports, backslashes, and encoded bypasses. Exploitation requires a user to follow attacker-supplied content and complete sign-in; the confirmed result is redirection to attacker-controlled content, with limited confidentiality and integrity impact reported.

CVSS severity5.4
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Open redirect in LangGenius Dify 1.11.4 allows remote attackers to disclose sensitive information through a crafted post-login URL. Post-login handlers use the unvalidated redirect_url value as a navigation target, accepting external domains, protocol-relative URLs, userinfo, nonstandard ports, backslashes, and encoded bypasses. Exploitation requires a user to follow attacker-supplied content and complete sign-in; the confirmed result is redirection to attacker-controlled content, with limited confidentiality and integrity impact reported.

The record

CVE
CVE-2026-18266
Published
Jul 29, 2026
Updated
Jul 29, 2026
Vendor
LangGenius
Product
Dify
Classifications
CWE-601, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 29, 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=1.11.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LangGenius · Difyversion=1.11.4

Published CVSS scores

5.4Zero Day InitiativeCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
T1204.001Malicious Link

Public exploit references

No public exploit references are available in this record.

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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