CVE-2026-57571
Crawl4AI arbitrary file write via download filename path traversal
Description
Crawl4AI 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 was taken from attacker-influenced input and joined to the downloads directory with no confinement. A filename containing an absolute path or traversal escaped the downloads directory, giving an arbitrary file write with attacker-controlled contents; the HTTP crawler path uses the response Content-Disposition filename and the browser crawler path uses the download's suggested filename. Because the written bytes are attacker-controlled, this can escalate to remote code execution. This issue is fixed in version 0.9.0.
INFO
Published Date :
July 6, 2026, 9:16 p.m.
Last Modified :
Oct. 25, 2026, 8:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update Crawl4AI to version 0.9.0 or later.
- Ensure file paths are properly validated.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-57571.
| URL | Resource |
|---|---|
| https://github.com/unclecode/crawl4ai/commit/60886d1a0c52682e4c83a7cef9dfac417fff6bd2 | Patch |
| https://github.com/unclecode/crawl4ai/security/advisories/GHSA-2jq4-q6vv-4cp3 | Mitigation Vendor Advisory Exploit |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-57571 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-57571
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-57571 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-57571 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 25, 2026
Action Type Old Value New Value Added Translation Title: crawl4ai de unclecode, Description: Crawl4AI es un rastreador y extractor web de código abierto compatible con LLM. Antes de la versión 0.9.0, cuando el rastreador guardaba un archivo descargado, el nombre del archivo de destino se tomaba de una entrada influenciada por el atacante y se unía al directorio de descargas sin confinamiento. Un nombre de archivo que contenía una ruta absoluta o de recorrido escapaba del directorio de descargas, permitiendo una escritura de archivo arbitraria con contenido controlado por el atacante; la ruta del rastreador HTTP utiliza el nombre de archivo Content-Disposition de la respuesta y la ruta del rastreador del navegador utiliza el nombre de archivo sugerido de la descarga. Dado que los bytes escritos están controlados por el atacante, esto puede escalar a ejecución remota de código. Este problema se solucionó en la versión 0.9.0. -
Initial Analysis by [email protected]
Jul. 07, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:kidocode:crawl4ai:*:*:*:*:*:*:*:* versions up to (excluding) 0.9.0 Added Reference Type GitHub, Inc.: https://github.com/unclecode/crawl4ai/commit/60886d1a0c52682e4c83a7cef9dfac417fff6bd2 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/unclecode/crawl4ai/security/advisories/GHSA-2jq4-q6vv-4cp3 Types: Exploit, Mitigation, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 07, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-57571', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-07T14:53:33.142454Z'} -
New CVE Received by [email protected]
Jul. 06, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'unclecode', 'product': 'crawl4ai', 'versions': [{'status': 'affected', 'version': '< 0.9.0'}]}] Added Description Crawl4AI 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 was taken from attacker-influenced input and joined to the downloads directory with no confinement. A filename containing an absolute path or traversal escaped the downloads directory, giving an arbitrary file write with attacker-controlled contents; the HTTP crawler path uses the response Content-Disposition filename and the browser crawler path uses the download's suggested filename. Because the written bytes are attacker-controlled, this can escalate to remote code execution. This issue is fixed in version 0.9.0. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Added CWE CWE-22 Added CWE CWE-59 Added Reference https://github.com/unclecode/crawl4ai/commit/60886d1a0c52682e4c83a7cef9dfac417fff6bd2 Added Reference https://github.com/unclecode/crawl4ai/security/advisories/GHSA-2jq4-q6vv-4cp3