Vulnerability · Published Aug 4, 2026 · Assigned by VulnCheck

CVE-2026-67198Perspective 5.0.0 DoS via VirtualServer Protocol Dispatcher

High 7.5

In plain English

A high-severity security flaw in perspective from perspective-dev. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.3%top 77.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
perspective-dev	perspective	0 – through 5.0.0

Weakness: CWE-616 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Researcher Disclosure technical-description, exploit
https://www.vulncheck.com/advisories/perspective-dos-via-virtualserver-protocol-dispatcher third-party-advisory