CVE-2026-67199: Allocation of Resources Without Limits or Throttling in perspective-dev perspective
Perspective version 5.0.0 and earlier contains a denial of service vulnerability where remote attackers can submit crafted expressions with unbounded loops in a TableMakeViewReq message. This causes the server's event loop to block indefinitely, making the server unresponsive to all clients. The vulnerability arises from the lack of iteration caps, deadlines, or cancellation checks in expression evaluation.
AI Analysis
Technical Summary
CVE-2026-67199 describes a denial of service vulnerability in Perspective up to version 5.0.0. Attackers can craft expressions containing unbounded for or while loops within a TableMakeViewReq message. These expressions are evaluated once per table row, allowing an arbitrarily large iteration count that blocks the Tornado IOLoop indefinitely. This lack of resource limits or throttling leads to the server becoming unresponsive to all connected clients.
Potential Impact
Successful exploitation results in a denial of service condition where the server event loop is blocked indefinitely, rendering the Perspective server unresponsive to all clients. This disrupts availability but does not indicate direct compromise of data confidentiality or integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround is currently documented. Users should monitor vendor communications for patches or updates addressing this vulnerability.
CVE-2026-67199: Allocation of Resources Without Limits or Throttling in perspective-dev perspective
Description
Perspective version 5.0.0 and earlier contains a denial of service vulnerability where remote attackers can submit crafted expressions with unbounded loops in a TableMakeViewReq message. This causes the server's event loop to block indefinitely, making the server unresponsive to all clients. The vulnerability arises from the lack of iteration caps, deadlines, or cancellation checks in expression evaluation.
CVSS v4.0
Score 7.1high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-67199 describes a denial of service vulnerability in Perspective up to version 5.0.0. Attackers can craft expressions containing unbounded for or while loops within a TableMakeViewReq message. These expressions are evaluated once per table row, allowing an arbitrarily large iteration count that blocks the Tornado IOLoop indefinitely. This lack of resource limits or throttling leads to the server becoming unresponsive to all connected clients.
Potential Impact
Successful exploitation results in a denial of service condition where the server event loop is blocked indefinitely, rendering the Perspective server unresponsive to all clients. This disrupts availability but does not indicate direct compromise of data confidentiality or integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround is currently documented. Users should monitor vendor communications for patches or updates addressing this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-07-28T16:06:49.774Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a71fdb7bf8831d539fada02
Added to database: 08/04/2026, 14:56:55 UTC
Last enriched: 08/04/2026, 15:26:42 UTC
Last updated: 08/04/2026, 15:26:42 UTC
Views: 4
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