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CVE-2026-56260 is an arbitrary file write vulnerability in Crawl4AI before version 0.8.7. The flaw affects the Docker API server’s /screenshot and /pdf endpoints, where the output_path parameter is not properly validated before being used as the destination for generated screenshot or PDF output. Because the application accepts absolute paths and directory traversal sequences, a remote attacker can cause the server to write attacker-controlled output to arbitrary filesystem locations writable by the application user. The vulnerable behavior is described in the FastAPI processing logic for screenshot and PDF generation, where the supplied path is resolved and then opened for binary write without confinement to an intended output directory. This enables overwriting existing files and modifying application or system state within the permissions of the Crawl4AI process.
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A critical path traversal / arbitrary file write vulnerability in Crawl4AI's Docker API server that allows unauthenticated remote attackers to write files to arbitrary filesystem locations via the output_path parameter in the /screenshot and /pdf endpoints.
An arbitrary file write vulnerability in Crawl4AI before version 0.8.7 affecting the Docker API server's /screenshot and /pdf endpoints via the output_path parameter, enabling path traversal or absolute-path writes that can overwrite writable server files and cause denial of service.
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