kortix-ai suna up to 0.8.38 Auth Endpoint page.tsx router.replace/router.push returnURL cross site scripting

Summaryinfo

A vulnerability identified as problematic has been detected in kortix-ai suna up to 0.8.38. This affects the function router.replace/router.push of the file apps/frontend/src/app/auth/page.tsx of the component Auth Endpoint. The manipulation of the argument returnURL leads to cross site scripting. This vulnerability is referenced as CVE-2026-12811. Remote exploitation of the attack is possible. Furthermore, an exploit is available. You should upgrade the affected component. The researcher explains: "The issue was fixed in v0.8.39 without notifying the wider user base via a security disclosure."

Detailsinfo

A vulnerability was found in kortix-ai suna up to 0.8.38 and classified as problematic. This issue affects the function router.replace/router.push of the file apps/frontend/src/app/auth/page.tsx of the component Auth Endpoint. The manipulation of the argument returnURL with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity.

The advisory is shared at gist.github.com. The identification of this vulnerability is CVE-2026-12811. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details as well as a public exploit are known. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

The exploit is available at gist.github.com. It is declared as proof-of-concept. The researcher explains: "The issue was fixed in v0.8.39 without notifying the wider user base via a security disclosure."

Upgrading to version 0.8.39 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch f5dec7aa0c1b8fa0125938f292c0f2430ca75f6c is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-38197). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Artificial Intelligence Software

Vendor

• kortix-ai

Name

• suna

Version

• 0.8.0
• 0.8.1
• 0.8.2
• 0.8.3
• 0.8.4
• 0.8.5
• 0.8.6
• 0.8.7
• 0.8.8
• 0.8.9
• 0.8.10
• 0.8.11
• 0.8.12
• 0.8.13
• 0.8.14
• 0.8.15
• 0.8.16
• 0.8.17
• 0.8.18
• 0.8.19
• 0.8.20
• 0.8.21
• 0.8.22
• 0.8.23
• 0.8.24
• 0.8.25
• 0.8.26
• 0.8.27
• 0.8.28
• 0.8.29
• 0.8.30
• 0.8.31
• 0.8.32
• 0.8.33
• 0.8.34
• 0.8.35
• 0.8.36
• 0.8.37
• 0.8.38

License

• open-source

Website

• Product: https://github.com/kortix-ai/suna/

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Submitinfo

Accepted

• Submit #837175: Kortix AI Suna < 0.8.39 DOM-XSS, Open Redirect (by trebledj)

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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