Veille CVE

‹ Retour à la liste

CVE-2026-53753

10.0 Critique

Publiée le 23/06/2026 à 21:17 · Modifiée le 29/06/2026 à 18:57 · Analysée par le NVD · Source : security-advisories@github.com

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.

Traduire en français

Produits concernés

Scores CVSS

VersionScoreSourceVecteur
3.1 9.8 Critique security-advisories@github.com CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1 10.0 Critique nvd@nist.gov (NVD) CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Faiblesses (CWE)

Références

Ailleurs