# CVE-2026-67198: Perspective VirtualServer protocol dispatcher denial of service

Source: https://junglewise.ai/threats/cve-2026-67198-perspective-virtualserver-protocol-dispatcher-denial-of-service  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-04. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-67198 · Severity: high · CVSS 7.5 · Published 2026-08-04

Perspective is an analytics and data visualization engine used in internal dashboards at banks and trading desks. An unauthenticated attacker can crash the server by sending specially crafted protocol messages with missing fields, causing a denial of service that disrupts availability of the analytics platform.

Technologies: [Perspective](https://junglewise.ai/threats/technologies/perspective). Vendors: [Perspective](https://junglewise.ai/threats/vendors/perspective).

## Quick answers

**Is CVE-2026-67198 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-67198 being exploited in the wild.

**How severe is CVE-2026-67198?** High severity, with a CVSS score of 7.5, published 4 August 2026.

**Which products and versions are affected?** Perspective 5.0.0.

**Is there a fix for CVE-2026-67198?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-67198 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-67198?** Check whether you run Perspective at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability exists in the VirtualServer protocol dispatcher's handling of protobuf messages. Attackers can send well-formed but incomplete protobuf messages (such as ViewToArrowReq without a viewport or MakeTableReq without a data field) that trigger unwrap() calls on None values at nine distinct code locations, causing the process to abort with SIGABRT. The attack requires no authentication and is reachable over the network through the WebSocket protocol. The flaw allows any remote attacker to repeatedly crash the server process, resulting in denial of service. A fix would involve proper null checking and error handling before calling unwrap() on optional protobuf fields.

## Affected products

- Perspective Perspective 5.0.0

## Timeline

- 2026-08-04: disclosed
- 2026-08-04: advisory

## References

- [https://christbowel.com/blog/perspective-5-0-0-five-cves/](https://christbowel.com/blog/perspective-5-0-0-five-cves/)
- [https://www.vulncheck.com/advisories/perspective-dos-via-virtualserver-protocol-dispatcher](https://www.vulncheck.com/advisories/perspective-dos-via-virtualserver-protocol-dispatcher)

## Related threats

- [Perspective path traversal in static file handler](https://junglewise.ai/threats/cve-2026-67200-perspective-path-traversal-in-static-file-handler)
- [Perspective DoS via unbounded loop in expression evaluation](https://junglewise.ai/threats/cve-2026-67199-perspective-dos-via-unbounded-loop-in-expression-evaluation)
- [Perspective Debug plugin cross-site scripting via innerHTML](https://junglewise.ai/threats/cve-2026-67196-perspective-debug-plugin-cross-site-scripting-via-innerhtml)
- [Perspective PolarsVirtualServer remote code execution via eval() injection](https://junglewise.ai/threats/cve-2026-67195-perspective-polarsvirtualserver-remote-code-execution-via-eval)