Medium severity · published Jun 30, 2026
CVE-2026-56264
Crawl4AI - Arbitrary JavaScript Execution via /execute_js Endpoint
6.1
CVSS
0.5%
EPSS
No
On KEV
Description
Crawl4AI before 0.8.7 contains an arbitrary JavaScript execution vulnerability in the Docker API server's /execute_js endpoint, which accepts and executes arbitrary user-supplied JavaScript in the server's browser context with --disable-web-security enabled. An attacker can execute arbitrary JavaScript and, combined with the browser's relaxed security settings, perform server-side request forgery against internal services.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CR
Crawl4AI · Crawl4AI
before 0.8.7 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-56264
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-56264
Product
https://github.com/unclecode/crawl4ai
Mitigation
https://github.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfg
Third Party Advisory
https://www.vulncheck.com/advisories/crawl4ai-arbitrary-javascript-execution-via-execute-js-endpoint
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