Application access via unlimited Basic Auth guesses
Published Jun 8, 2026 · Updated Jun 8, 2026
Insufficient credential protection in Flowise before 3.1.2 allows remote attackers to gain application access through Basic Auth guessing. The checkBasicAuth controller reads username and password values from the request body, compares them directly with environment variables, applies no rate limit, and returns different success and failure messages. Any network client reaching the endpoint can make unlimited unauthenticated guesses; a correct pair grants access to the application.
Summary
What happened
Insufficient credential protection in Flowise before 3.1.2 allows remote attackers to gain application access through Basic Auth guessing. The checkBasicAuth controller reads username and password values from the request body, compares them directly with environment variables, applies no rate limit, and returns different success and failure messages. Any network client reaching the endpoint can make unlimited unauthenticated guesses; a correct pair grants access to the application.
The record
- CVE
- CVE-2026-46440
- Published
- Jun 8, 2026
- Updated
- Jun 8, 2026
- Vendor
- FlowiseAI
- Product
- Flowise
- Classifications
- CWE-522, T1110
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 8, 2026CVE publishedPublication date reported by the CVE source.
- Jun 8, 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?
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- Affected versionversion=< 3.1.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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