CVE-2026-67199

Summary

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.

Affected Software

Weaknesses

• CWE-770: Allocation of Resources Without Limits or Throttling

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

Additional References

• https://christbowel.com/blog/perspective-5-0-0-five-cves/

References

• https://christbowel.com/blog/perspective-5-0-0-five-cves/
• https://www.vulncheck.com/advisories/perspective-dos-via-loop-expression-evaluation

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