What is CVE-2026-47099?

CVE-2026-47099 is a medium-severity vulnerability in Storybookjs Telejson, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-05-20.

How severe is CVE-2026-47099?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Storybookjs Telejson

CVE-2026-47099

TeleJSON prior to 6.0.0 contains a DOM-based cross-site scripting vulnerability in the parse() function that allows attackers to execute arbitrary JavaScript by delivering a crafted JSON payload containing a malicious _constructor-name_ pr…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (11.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Storybookjs Telejson — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (vendor-advisory, patch)
disclosure@vulncheck.com (third-party-advisory)
disclosure@vulncheck.com (technical-description)

Frequently asked questions

What is CVE-2026-47099?: CVE-2026-47099 is a medium-severity vulnerability in Storybookjs Telejson, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-05-20.
How severe is CVE-2026-47099?: Medium severity. CVSS v3 base score is 6.1 out of 10.