CVE-2026-67198: Incomplete Identification of Uploaded File Variables (PHP) in perspective-dev perspective
Perspective version 5.0.0 has a denial-of-service vulnerability in its VirtualServer protocol dispatcher. Unauthenticated remote attackers can crash the server by sending malformed or incomplete protobuf messages that cause the server process to abort. This occurs due to unwrap() calls on None values triggered by missing required fields in certain requests.
AI Analysis
Technical Summary
CVE-2026-67198 affects Perspective 5.0.0, where the VirtualServer protocol dispatcher does not properly validate uploaded protobuf message variables. Attackers can send well-formed requests such as ViewToArrowReq without a viewport or MakeTableReq without a data field. These malformed inputs cause unwrap() calls on None values at nine distinct code sites, leading to process termination with SIGABRT and resulting in a denial-of-service condition. The vulnerability requires no authentication and can be triggered remotely.
Potential Impact
An unauthenticated remote attacker can cause the Perspective server process to crash, resulting in denial of service. This disrupts availability of the affected service until recovery or restart. There is no indication of data disclosure or code execution from the provided information.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Until a patch is available, consider restricting access to the VirtualServer protocol dispatcher or filtering malformed protobuf messages if possible.
CVE-2026-67198: Incomplete Identification of Uploaded File Variables (PHP) in perspective-dev perspective
Description
Perspective version 5.0.0 has a denial-of-service vulnerability in its VirtualServer protocol dispatcher. Unauthenticated remote attackers can crash the server by sending malformed or incomplete protobuf messages that cause the server process to abort. This occurs due to unwrap() calls on None values triggered by missing required fields in certain requests.
CVSS v4.0
Score 8.7high
Affected software
perspective-dev
perspective
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-67198 affects Perspective 5.0.0, where the VirtualServer protocol dispatcher does not properly validate uploaded protobuf message variables. Attackers can send well-formed requests such as ViewToArrowReq without a viewport or MakeTableReq without a data field. These malformed inputs cause unwrap() calls on None values at nine distinct code sites, leading to process termination with SIGABRT and resulting in a denial-of-service condition. The vulnerability requires no authentication and can be triggered remotely.
Potential Impact
An unauthenticated remote attacker can cause the Perspective server process to crash, resulting in denial of service. This disrupts availability of the affected service until recovery or restart. There is no indication of data disclosure or code execution from the provided information.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Until a patch is available, consider restricting access to the VirtualServer protocol dispatcher or filtering malformed protobuf messages if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-07-28T16:06:49.774Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a71fdb5bf8831d539fad9be
Added to database: 08/04/2026, 14:56:53 UTC
Last enriched: 08/11/2026, 18:23:58 UTC
Last updated: 09/18/2026, 02:30:59 UTC
Views: 27
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