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Vulnerabilities CVE-2026-67199

CVE-2026-67199

High
Open
TLP:CLEAR

Perspective 5.0.0 DoS via Loop Expression Evaluation

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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.

Details

CVSS Score
7.1
EPSS Score
0.30%

22.3th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Confidence
90%
Published
Aug 4, 2026
Last Modified
Aug 4, 2026
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