CVE-2026-91942CWE-79cross-site-scripting

CVE-2026-91942

Medium · published September 15, 2026

CVSS v3.1
5.4
EPSS
0%
Percentile
13.9
In the wild
Unconfirmed
What it is

crawl4ai before 0.9.3 contains a DOM-based cross-site scripting vulnerability in the Docker Playground UI that assigns untrusted crawl results to element.innerHTML. Attackers can craft malicious PDFs with event-handler markup to execute JavaScript in the Playground origin and steal API tokens from sessionStorage for authenticated API abuse.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
5.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
EPSS
0.00237 · 13.9th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-09-15T20:17Z
References (3)
https://github.com/unclecode/crawl4ai/security/advisories/GHSA-7g3g-vhm6-79f3 · [email protected]https://www.vulncheck.com/advisories/crawl4ai-before-0.9.3-cross-site-scripting-via-innerhtml · [email protected]https://github.com/unclecode/crawl4ai/security/advisories/GHSA-7g3g-vhm6-79f3 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 17 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 15 SEP 15:18Z
    crawl4ai before 0.9.3 Cross-Site Scripting via innerHTML
    cvelistv5