CVE-2026-67199: high-severity vulnerability in perspective-dev perspective
Perspective 5.0.0 DoS via Loop Expression Evaluation
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 7.1epss 0.5%
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.
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
Affected products
perspective-dev · perspectivepublic PoCs found — 1
cve_referencechristbowel.com/blog/perspective-5-0-0-five-cves/unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — perspective-dev perspective
In the same product, most dangerous first.
CVE-2026-67195HIGHPerspective 5.0.0 RCE via eval() Expression InjectionEPSS 1.2%CVE-2026-67200HIGHPerspective 5.0.0 Path Traversal via cwd_static_file_handlerEPSS 0.9%CVE-2026-67198HIGHPerspective 5.0.0 DoS via VirtualServer Protocol DispatcherEPSS 0.3%CVE-2026-67196MEDIUMPerspective 5.0.0 XSS via Debug Plugin innerHTML InterpolationEPSS 0.3%