CVE-2026-67198
HIGHDescription
Perspective 5.0.0 contains a denial-of-service vulnerability in the VirtualServer protocol dispatcher that allows unauthenticated remote attackers to crash the server process by sending malformed or incomplete protobuf messages. Attackers can send well-formed requests such as ViewToArrowReq with no viewport set or MakeTableReq with no data field to trigger unwrap() calls on None values at nine distinct sites, causing the process to abort with SIGABRT.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploit Intelligence
Low risk: more likely to be exploited than 10% of all known CVEs.
References
Related Vulnerabilities
Other CWE-616 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2023-38947 | High | 7.2 | 0.5% | - | - |
| CVE-2025-67084 | Critical | 9.9 | 0.4% | - | Fix |
| CVE-2024-29858 | Critical | 9.8 | 0.4% | - | Fix |
| CVE-2024-31601 | Critical | 9.8 | 0.4% | - | - |
| CVE-2026-22789 | Medium | 5.4 | 0.2% | - | - |
| CVE-2025-59402 | Medium | 5.4 | 0.2% | - | - |
Common questions
How do I fix CVE-2026-67198?
No published fix for CVE-2026-67198 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2026-67198 being actively exploited?
Not that we know of. CVE-2026-67198 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.20% is the estimated probability that it will be exploited in the next 30 days. That is higher than 10% of all scored CVEs.
How severe is CVE-2026-67198?
CVE-2026-67198 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-08-04.