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.
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History
Wed, 05 Aug 2026 10:45:00 +0000
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Tue, 04 Aug 2026 17:30:00 +0000
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Tue, 04 Aug 2026 15:00:00 +0000
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| Description | 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. | |
| Title | Perspective 5.0.0 DoS via Loop Expression Evaluation | |
| Weaknesses | CWE-770 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-08-04T14:04:19.854Z
Updated: 2026-08-04T16:46:11.782Z
Reserved: 2026-07-28T16:06:49.774Z
Link: CVE-2026-67199
Updated: 2026-08-04T16:46:01.907Z
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