Is CVE-2026-12811 actively exploited?

No active exploitation of CVE-2026-12811 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-12811 be exploited remotely?

Yes. CVE-2026-12811 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-12811?

CVE-2026-12811 has a CVSS score of 4.3 (MEDIUM).

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MEDIUM

CVE-2026-12811

CWE-79Published: June 21, 2026· Updated: Jun 23, 2026

4.3

CVSS v3.1

EPSS:0.29%probability of exploitation in 30 daysPercentile:20.4th

Official 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."

NVD Source

Technical Analysis

CVE-2026-12811 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.