CVE-2026-57571: Crawl4AI is an open-source LLM-friendly web crawler and scraper

Q: How do I fix CVE-2026-57571?

crawl4ai: upgrade to 0.9.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-57571 being exploited?

CVE-2026-57571 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-57571 affect?

CVE-2026-57571 affects crawl4ai. Severity is critical (CVSS 9.6). 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 confi

Q: How urgent is CVE-2026-57571?

Priority 53/100. Critical severity; Public exploit reference

This month

CRITICAL 9.6UPGRADE

CVE-2026-57571 is a critical-severity flaw (CVSS 9.6) affecting crawl4ai. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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-Dis

Why this priority

Critical severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	9.6 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-22, CWE-59
Published	2026-07-06
Last modified	2026-10-25

Publisher (CNA): GitHub, Inc. · Vendor: kidocode

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-06 21:16 UTCPublished CVE record published
2026-10-25 20:10 UTCUpdated Record last modified

kidocode crawl4ai UPGRADE

Affected: < 0.9.0

Fixed in: 0.9.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy crawl4ai || rpm -q crawl4ai || crawl4ai --version

2. UPGRADE to 0.9.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade crawl4ai

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade crawl4ai

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Fedora 46 · python-apprise · FIXED · 2.1.0-1.fc46 · FEDORA-2026-ef67a72c5d · source

sudo dnf upgrade --advisory=FEDORA-2026-ef67a72c5d

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/unclecode/crawl4ai/security/advisories/GHSA-2jq4-q6vv-4cp3

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-57571?

crawl4ai: upgrade to 0.9.0. Exact commands for each OS are on this page.

Is CVE-2026-57571 being exploited?

CVE-2026-57571 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-57571 affect?

CVE-2026-57571 affects crawl4ai. Severity is critical (CVSS 9.6). 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 confi

How urgent is CVE-2026-57571?

Priority 53/100. Critical severity; Public exploit reference

Related CVEs

CVE-2026-57572 CRITICAL 10.0 UPGRADE Crawl4AI is an open-source LLM-friendly web crawler and scraper
CVE-2026-57573 HIGH 8.6 UPGRADE Crawl4AI is an open-source LLM-friendly web crawler and scraper
CVE-2026-56261 HIGH 8.6 UPGRADE Crawl4AI before 0.8.7 contains a server-side request forgery (SSRF) vulnerability in the Docker API server's /

References

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