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CVE-2026-109239— Crawl4AI before 0.9.4 Blind SSRF via RobotsParser.can_fetch robots.txt Fetch

Quick assessment

Affected
unclecode crawl4ai
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Crawl4AI 在 0.9.4 版本之前存在一个盲服务器端请求伪造（SSRF）漏洞，位于 RobotsParser.can_fetch 方法中。该漏洞允许未认证的攻击者绕过 Docker 服务器的出站（egress）控制策略。攻击者通过启用 check_robots_txt 选项，并利用重定向或 DNS 重绑定技术，可以访问内部网络地址、回环地址或云元数据地址，从而进行服务发现。

CVSS 5.3 · Medium EPSS 0.27% · P17

Possible ATT&CK Techniques 1 AI

T1590 · Gather Victim Network Information

Affected Version Matrix 2

VendorProduct Version RangeStatus
unclecode crawl4ai < 0.9.4 affected
0.9.4 unaffected
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I. Basic Information for CVE-2026-109239

Vulnerability Information
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Vulnerability Title
Crawl4AI before 0.9.4 Blind SSRF via RobotsParser.can_fetch robots.txt Fetch
Source: CVE Program / CVE List V5
Vulnerability Description
Crawl4AI before 0.9.4 contains a blind server-side request forgery vulnerability in RobotsParser.can_fetch that lets unauthenticated attackers bypass Docker server egress controls. Attackers can enable check_robots_txt and use redirects or DNS rebinding to reach internal, loopback, or cloud-metadata addresses for service discovery.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
unclecode crawl4ai 0 ~ 0.9.4 -

II. Public POCs for CVE-2026-109239

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III. Intelligence Information for CVE-2026-109239

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Vendor Advisories for CVE-2026-109239 (2)

Same Patch Batch · unclecode · 2026-10-12 · 3 CVEs total

CVE-2026-109238 8.6 HIGH Crawl4AI 0.7.0 before 0.9.4 SSRF via link_preview_config URL Seeder
CVE-2026-109237 8.1 HIGH Crawl4AI 0.9.0 before 0.9.4 Untrusted Config Gate Bypass Leaks Environment Variables

IV. Related Vulnerabilities

Same product: crawl4ai
Same vendor: unclecode
Same weakness: CWE-918

V. Comments for CVE-2026-109239

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