XSS in Perspective-Dev Perspective
CVE-2026-67196
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (17.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Perspective-Dev Perspective — versions 0
Weakness classification (CWE)
References
- christbowel.com/blog/perspective-5-0-0-five-cves/ (technical-description, exploit)
- www.vulncheck.com/advisories/perspective-xss-via-debug-plugin-innerhtml-interpo… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-67196?
- CVE-2026-67196 is a medium-severity vulnerability in Perspective-Dev Perspective, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-08-04.
- How severe is CVE-2026-67196?
- Medium severity. CVSS v3 base score is 5.4 out of 10.