Exploit discussion active in current signal (1 latest mentions)
Recommended action window: High priority (within 72h)
NVD description
Crawl4AI is an open-source LLM friendly web crawler & scraper. Prior to 0.8.7, the _safe_eval_expression() function in the computed fields feature uses an AST validator that only blocks attributes starting with underscore. Python generator and frame object attributes (gi_frame, f_back, f_builtins) do NOT start with underscore, enabling a complete sandbox escape to achieve arbitrary code execution. The attack requires no authentication (JWT disabled by default) and is triggered via POST /crawl with a crafted extraction schema. This vulnerability is fixed in 0.8.7.
Priority
LOW
Exploitation
NONE
PoC
YES
Patch
AVAILABLE
Momentum
STABLE
If you run products in this scope, you should treat this CVE as relevant to your environment.
| Date | Total | Labels |
|---|
| 2026-06-17 | 1 | Disclosure1 |
| 2026-06-24 | 1 | Patch1 |
| 2026-07-08 | 1 | General1 |
| 2026-07-17 | 1 | Disclosure1 |
| 2026-08-18 | 1 | Disclosure1 |
🚨 CVE-2026-53753 - critical 🚨 Crawl4AI <= 0.8.6 - Remote Code Execution > Crawl4AI through 0.8.6 ships a Docker API server that exposes an unauthenticated /cra... 👾 https://cloud.projectdiscovery.io/library/CVE-2026-53753 @pdnuclei #NucleiTemplates #cve
Post summary
A critical CVE (CVE-2026-53753) impacting Crawl4AI <= 0.8.6 is disclosed, highlighting a Remote Code Execution flaw through an exposed Docker API endpoint.
CVE-2026-53753: Crawl4AI Sandbox Escape Remote Code Execution - What It Means for Your Business and How to Respond https://hubs.li/Q04pTQnm0
Post summary
The content announces CVE‑2026‑53753, a Crawl4AI sandbox escape RCE, without providing PoC, exploit details, or patch information, focusing instead on the business implications and suggested responses.
Another reminder that trust is earned, not assumed. CVE-2026-53753. Crawl4AI: AST Sandbox Escape via gi_frame.f_back Chain - Pre-Auth RCE in Docker API The best defense is the one you set up before you needed it.
Post summary
The tweet references CVE-2026-53753 as a pre‑authentication remote code execution in Docker API, noting the AST sandbox escape via gi_frame.f_back, but offers no proof of exploitation, patch information, or active attacks.
🚨Crawl4AI RCE: CVE-2026-53753 — unsafe AST validation leads to sandbox escape and remote code execution via POST /crawl. Upgrade to 0.8.7, enable auth/JWT, and block public access to crawling endpoints. Learn more → https://app.rapidriskradar.com/cve/CVE-2026-53753 https://t.co/Rg3dZhLCdn
Post summary
The tweet alerts to a CVE-2026-53753 RCE in Crawl4AI due to unsafe AST validation, offers remediation steps, but provides no PoC, exploit, or evidence of active exploitation.
🚨 CRITICAL - Remote Code Execution in Crawl4AI (CVE-2026-53753) Crawl4AI's sandbox for evaluating computed field expressions fails to block generator and frame attributes (e.g., gi_frame, f_back, f_builtins), allowing attackers to bypass validation. By sending a specially crafted POST /crawl request, an unauthenticated attacker can execute arbitrary code or commands on the underlying server. This vulnerability poses a severe risk, enabling full compromise of affected systems. 👉 Affected: Crawl4AI versions <= 0.8.6 | fix version 0.8.7
Post summary
A critical remote code execution vulnerability (CVE-2026-53753) in Crawl4AI’s sandbox has been disclosed, with detailed exploitation logic provided and an update (0.8.7) identified as the fix.
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| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | kidocode | crawl4ai | - | - | - |