Medium severity · published Sep 15, 2026
CVE-2026-91942
crawl4ai before 0.9.3 Cross-Site Scripting via innerHTML
5.4
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CR
crawl4ai · unclecode
before 0.9.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-91942
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-91942
github.com
https://github.com/unclecode/crawl4ai/security/advisories/GHSA-7g3g-vhm6-79f3
www.vulncheck.com
https://www.vulncheck.com/advisories/crawl4ai-before-0.9.3-cross-site-scripting-via-innerhtml
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