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Crawl4AI CVE-2026-56260

| EUVDEUVD-2026-43227 HIGH
Path Traversal (CWE-22)
2026-07-12 VulnCheck GHSA-r9hw-78q5-478g
Path Traversal Denial Of Service Docker Crawl4ai
8.8
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
8.8 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
9.1 CRITICAL

Remote, low-complexity, unauthenticated write to the default Docker server (AV:N/AC:L/PR:N); write-only primitive gives I:H and A:H via file overwrite/DoS, with no confidentiality impact.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
Patch available
Jul 12, 2026 - 13:01 EUVD
Analysis Generated
Jul 12, 2026 - 12:37 vuln.today
CVE Published
Jul 12, 2026 - 12:06 cve.org
HIGH 8.8

DescriptionCVE.org

Crawl4AI before 0.8.7 contains an arbitrary file write vulnerability in the Docker API server's /screenshot and /pdf endpoints. The output_path parameter accepts arbitrary filesystem paths without validation, allowing an attacker to supply absolute or path-traversal values to write to any location writable by the application's user, overwriting server files and causing denial of service.

AnalysisAI

Arbitrary file write in Crawl4AI's Docker API server (versions before 0.8.7) lets remote unauthenticated attackers overwrite any file writable by the service account by abusing the unvalidated output_path parameter on the /screenshot and /pdf endpoints. Reported by VulnCheck and disclosed in GitHub advisory GHSA-365w-hqf6-vxfg, the flaw enables path traversal or absolute-path writes that corrupt server files and cause denial of service. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Reach exposed Crawl4AI Docker server
Delivery
Send crafted /screenshot or /pdf request
Exploit
Set output_path to traversal or absolute path
Execution
Server writes file outside output directory
Persist
Overwrite critical server file
Impact
Denial of service
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Vulnerability AssessmentAI

Exploitation Requires a reachable Crawl4AI Docker API server (versions before 0.8.7) with the /screenshot or /pdf endpoints accessible, and per the CVSS vector (AV:N/AC:L/PR:N/UI:N) no authentication or user interaction against a default, unauthenticated deployment. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H) and score of 8.8 describe a network-reachable, low-complexity attack needing no privileges or user interaction, with high integrity and availability impact but no confidentiality loss - consistent with a write/overwrite-only primitive rather than data theft. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker who can reach an exposed Crawl4AI Docker server sends a crafted POST to /screenshot or /pdf with output_path set to a traversal or absolute path such as '../../app/server_config' or a path over a critical application file. The server renders the artifact and writes it to the attacker-chosen location, overwriting the target file and rendering the service inoperable (denial of service). …
Remediation Vendor-released patch: upgrade Crawl4AI to 0.8.7 or later, which adds validation of the output_path parameter; this is the primary and recommended fix per advisory GHSA-365w-hqf6-vxfg (https://github.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfg). … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Inventory all Crawl4AI deployments and identify versions below 0.8.7; restrict network access to the Docker API and /screenshot and /pdf endpoints using firewall rules. …

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Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-56260 vulnerability details – vuln.today
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