Perspective-dev Perspective up to 5.0.0 Expression infinite loop

Summaryinfo

A vulnerability described as problematic has been identified in Perspective-dev Perspective up to 5.0.0. This affects an unknown part of the component Expression Handler. Such manipulation leads to infinite loop. This vulnerability is listed as CVE-2026-67199. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Perspective-dev Perspective up to 5.0.0. It has been rated as problematic. Affected by this issue is an unknown code block of the component Expression Handler. The manipulation with an unknown input leads to a infinite loop vulnerability. Using CWE to declare the problem leads to CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. Impacted is availability. CVE summarizes:

Perspective 5.0.0 contains a denial of service vulnerability that allows remote attackers to block the server event loop indefinitely by submitting a crafted expression containing unbounded for or while loop constructs in a TableMakeViewReq message. Attackers can embed an arbitrarily large iteration count in an expression column evaluated once per table row, causing the Tornado IOLoop to block without any iteration cap, deadline, or cancellation check, rendering the server unresponsive to all connected clients.

The advisory is available at christbowel.com. This vulnerability is handled as CVE-2026-67199 since 07/28/2026. The exploitation is known to be easy. The attack may be launched remotely. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Perspective-dev

Name

• Perspective

Version

• 5.0

CPE 2.3info

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CPE 2.2info

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