CVE-2026-12811
Received Received - Intake
Reflected XSS in kortix-ai Suna

Publication date: 2026-06-21

Last updated on: 2026-06-21

Assigner: VulDB

Description
A weakness has been identified in kortix-ai suna up to 0.8.38. Affected by this issue is the function router.replace/router.push of the file apps/frontend/src/app/auth/page.tsx of the component Auth Endpoint. Executing a manipulation of the argument returnURL can lead to cross site scripting. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 0.8.39 can resolve this issue. This patch is called f5dec7aa0c1b8fa0125938f292c0f2430ca75f6c. It is advisable to 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."
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Meta Information
Published
2026-06-21
Last Modified
2026-06-21
Generated
2026-06-22
AI Q&A
2026-06-22
EPSS Evaluated
N/A
NVD
CVE-2026-12811
EUVD
EUVD-2026-38197
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
kortix-ai suna 0.8.39
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-94 The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
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.
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Executive Summary

This vulnerability exists in the kortix-ai suna software up to version 0.8.38, specifically in the function router.replace/router.push within the file apps/frontend/src/app/auth/page.tsx of the Auth Endpoint component.

The issue arises from improper handling of the argument returnURL, which can be manipulated to perform a cross-site scripting (XSS) attack.

An attacker can exploit this vulnerability remotely by injecting malicious scripts through the returnURL parameter.

The vulnerability has been publicly disclosed and an exploit is available.

Upgrading to version 0.8.39 resolves this issue.

Impact Analysis

This vulnerability can allow an attacker to execute cross-site scripting (XSS) attacks by manipulating the returnURL parameter.

Such attacks can lead to the execution of malicious scripts in the context of the victim's browser, potentially resulting in session hijacking, theft of sensitive information, or unauthorized actions performed on behalf of the user.

Since the attack can be launched remotely, it poses a risk to any user interacting with the affected component.

The overall severity is considered low to moderate based on CVSS scores, but the presence of a public exploit increases the risk.

Mitigation Strategies

The immediate step to mitigate this vulnerability is to upgrade kortix-ai suna to version 0.8.39, where the issue has been fixed.

This upgrade addresses the cross site scripting vulnerability in the router.replace/router.push functions of the Auth Endpoint component.

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