Improper Output Neutralization for Logs Affecting crawl4ai package, versions [,0.8.8)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published28 Jun 2026
- disclosed16 Jun 2026
- creditUnknown
Introduced: 16 Jun 2026
NewCVE-2026-56258 (opens in a new tab)How to fix?
Upgrade Crawl4AI to version 0.8.8 or higher.
Overview
Crawl4AI is a 🚀🤖 Crawl4AI: Open-source LLM Friendly Web Crawler & scraper
Affected versions of this package are vulnerable to Improper Output Neutralization for Logs via the output_path parameter in the Docker API server's screenshot and PDF endpoints, which failed to properly resolve symlinks and allowed file writes outside the intended directory. An attacker can achieve arbitrary file writes, potentially leading to code execution, by supplying crafted symlinked paths. Additionally, user-controlled input was reflected into log lines and webhook headers without adequate sanitization, enabling log forging and injection of unauthorized headers in outbound webhook requests. This is only exploitable if the API is left unauthenticated or the runtime user has write access to sensitive locations.
Workaround
This vulnerability can be mitigated by enabling authentication with CRAWL4AI_API_TOKEN or running the container with a read-only root filesystem.