CVE-2026-67198Public exploitNetwork attack vector

Unauthenticated server crash via unchecked protobuf fields

Published Aug 4, 2026 · Updated Aug 4, 2026

Denial of service in Perspective 5.0.0 allows remote attackers to crash VirtualServer backends with incomplete protobuf messages. The dispatcher directly unwraps optional proto3 fields and view-configuration lookups at nine sites instead of returning the existing unknown-view error, so omitted fields or nonexistent view IDs become None values that abort the process. Any unauthenticated client able to reach a WebSocket-backed VirtualServer can interrupt every hosted table and connected client; the native engine is not affected.

CVSS severity8.7
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Perspective 5.0.0 allows remote attackers to crash VirtualServer backends with incomplete protobuf messages. The dispatcher directly unwraps optional proto3 fields and view-configuration lookups at nine sites instead of returning the existing unknown-view error, so omitted fields or nonexistent view IDs become None values that abort the process. Any unauthenticated client able to reach a WebSocket-backed VirtualServer can interrupt every hosted table and connected client; the native engine is not affected.

The record

CVE
CVE-2026-67198
Published
Aug 4, 2026
Updated
Aug 4, 2026
Vendor
Perspective
Product
Perspective
Classifications
CWE-616, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=5.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Perspective · Perspectiveversion=0 <=5.0.0

Published CVSS scores

7.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-616Incomplete Identification of Uploaded File Variables (PHP)
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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