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Vulnerability record · CVE-2026-53755 · published 23 June 2026

CVE-2026-53755: Kidocode crawl4ai server-side request forgery (ssrf) vulnerability

Kidocode · Crawl4ai

Crawl4AI is an open-source LLM friendly web crawler & scraper. Prior to 0.8.9, the Docker API server applied its SSRF destination check to the crawl target URL only, not to the proxy address. An unauthenticated request could supply a proxy pointing at an internal IP and route the browser through it, reaching internal services and cloud-metadata endpoints, while using a perfectly valid crawl URL. The Docker API is unauthenticated by default. /crawl, /crawl/stream, and /crawl/job accept a browser_config (and crawler_config). The following all feed Chromium's egress and were unchecked: browser_config.proxy_config.server, browser_config.proxy (deprecated field), crawler_config.proxy_config.server, and --proxy-server / --proxy-pac-url / --proxy-bypass-list / --host-resolver-rules flags in browser_config.extra_args. This vulnerability is fixed in 0.8.9.

7.5 CVSS 3.1 High EPSS 1.6% · top 25.5% CWE-918 · Server-side request forgery (SSRF)
7.5CVSS 3.1 base score
1.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
29 Jun 2026Last modified by NVD

Description

Crawl4AI is an open-source LLM friendly web crawler & scraper. Prior to 0.8.9, the Docker API server applied its SSRF destination check to the crawl target URL only, not to the proxy address. An unauthenticated request could supply a proxy pointing at an internal IP and route the browser through it, reaching internal services and cloud-metadata endpoints, while using a perfectly valid crawl URL. The Docker API is unauthenticated by default. /crawl, /crawl/stream, and /crawl/job accept a browser_config (and crawler_config). The following all feed Chromium's egress and were unchecked: browser_config.proxy_config.server, browser_config.proxy (deprecated field), crawler_config.proxy_config.server, and --proxy-server / --proxy-pac-url / --proxy-bypass-list / --host-resolver-rules flags in browser_config.extra_args. This vulnerability is fixed in 0.8.9.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/unclecode/crawl4ai/security/advisories/GHSA-6qhc-x826-342c Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2026-57572Kidocode crawl4ai argument injection vulnerabilityCrawl4AI is an open-source LLM-friendly web crawler and scraper. Prior to 0.9.0, the Docker API server accepted request-supplied browser_config.extra…EPSS 0.94%10.0CVE-2026-53753Kidocode crawl4ai code injection vulnerabilityCrawl4AI is an open-source LLM friendly web crawler & scraper. Prior to 0.8.7, the _safe_eval_expression() function in the computed fields feature us…EPSS 2.9%10.0CVE-2026-26216Kidocode crawl4ai code injection vulnerabilityCrawl4AI versions prior to 0.8.0 contain a remote code execution vulnerability in the Docker API deployment. The /crawl endpoint accepts a hooks para…EPSS 1.7%9.6CVE-2026-57571Kidocode crawl4ai path traversal vulnerabilityCrawl4AI 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 w…EPSS 0.81%9.3CVE-2026-56265Kidocode crawl4ai hard-coded credentials vulnerabilityCrawl4AI before 0.8.7 contains an authentication bypass vulnerability due to a hardcoded default JWT signing key in the Docker API server. Attackers …EPSS 2.6%9.2CVE-2026-56261Kidocode crawl4ai server-side request forgery (ssrf) vulnerabilityCrawl4AI before 0.8.7 contains a server-side request forgery (SSRF) vulnerability in the Docker API server's /crawl/job and /llm/job endpoints, which…EPSS 0.51%9.2CVE-2026-56264Kidocode crawl4ai code injection vulnerabilityCrawl4AI before 0.8.7 contains an arbitrary JavaScript execution vulnerability in the Docker API server's /execute_js endpoint, which accepts and exe…EPSS 0.49%9.2CVE-2026-56258Kidocode crawl4ai path traversal vulnerabilityCrawl4AI before 0.8.8 contains an arbitrary file write vulnerability in the screenshot and PDF endpoints that allows unauthenticated attackers to wri…EPSS 0.91%

Source: NIST National Vulnerability Database (record CVE-2026-53755), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.