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CVE-2026-57571

Kidocode Crawl4ai remote code execution

9.6 CRITICALPublic exploitEPSS 0.81%
  1. Published6 Jul 2026

Description

Crawl4AI is an open-source LLM-friendly web crawler and scraper. Prior to 0.9.0, when the crawler saves a downloaded file, the destination filename was taken from attacker-influenced input and joined to the downloads directory with no confinement. A filename containing an absolute path or traversal escaped the downloads directory, giving an arbitrary file write with attacker-controlled contents; the HTTP crawler path uses the response Content-Disposition filename and the browser crawler path uses the download's suggested filename. Because the written bytes are attacker-controlled, this can escalate to remote code execution. This issue is fixed in version 0.9.0.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Affected products

Kidocode Crawl4ai< 0.9.0

Remediation

Fixed in
Kidocode Crawl4ai≥ 0.9.0

References

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Frequently asked

Is CVE-2026-57571 being actively exploited?

CVE-2026-57571 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.81%.

How severe is CVE-2026-57571?

CVE-2026-57571 has a CVSS 3.1 base score of 9.6, rated critical. EPSS estimates a 0.81% probability of exploitation.

Which products are affected by CVE-2026-57571?

Affected products include Kidocode Crawl4ai.

How do I fix CVE-2026-57571?

Upgrade affected software to a fixed version, for example Kidocode Crawl4ai 0.9.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-57571 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.