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TI-2026-47521 Aliases CVE-2026-67199GHSA-vc2q-3q58-3rrv

Perspective 5.0.0 DoS via Loop Expression Evaluation

Priority MEDIUM 64CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-770.

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00519 44th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
perspective-devperspectiveup to 5.0.0—No fix listedCNA
  • perspective Vendorperspective-dev Affected up to 5.0.0 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-67199
  2. 2026-10-03 Alias added: GHSA-vc2q-3q58-3rrv

References

Exploit 1

  • TI-2026-47522 Perspective 5.0.0 Path Traversal via cwd_static_file_handler CVSS 4.0HIGH 8.7
  • TI-2026-47520 Perspective 5.0.0 DoS via VirtualServer Protocol Dispatcher CVSS 4.0HIGH 8.7
  • TI-2026-47518 Perspective 5.0.0 RCE via eval() Expression Injection CVSS 4.0HIGH 8.7
  • TI-2026-47519 Perspective 5.0.0 XSS via Debug Plugin innerHTML Interpolation CVSS 4.0MEDIUM 5.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences