CVE-2026-53755: Crawl4AI is an open-source LLM friendly web crawler & scraper

Q: How do I fix CVE-2026-53755?

crawl4ai: upgrade to 0.8.9. Exact commands for each OS are on this page.

Q: Is CVE-2026-53755 being exploited?

CVE-2026-53755 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-2026-53755 affect?

CVE-2026-53755 affects crawl4ai. Severity is high (CVSS 8.6). Crawl4AI is an open-source LLM friendly web crawler & scraper. Prior to 0.8.9, the Docker API server applied its SSRF destination check to the crawl target URL only, not to the proxy address. An unauthenticated request could supply a proxy

Q: How urgent is CVE-2026-53755?

Priority 54/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 8.6REMOTEUPGRADE

CVE-2026-53755 is a high-severity flaw (CVSS 8.6) 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 & scraper. Prior to 0.8.9, the Docker API server applied its SSRF destination check to the crawl target URL only, not to the proxy address. An unauthenticated request could supply a proxy pointing at an internal IP and route the browser through it, reaching internal services and cloud-metadata endpoints, while using a perfectly valid crawl URL. The Docker API is unauthenticated by default. /craw

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.6 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.6% (top 25%)
CISA exploited list	No
Weakness	CWE-918
Published	2026-06-23
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

2026-06-23 19:17 UTCPublished CVE record published
2026-10-25 23:10 UTCUpdated Record last modified

kidocode crawl4ai UPGRADE

Affected: < 0.8.9

Fixed in: 0.8.9

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 0.8.9 (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

Python (pip) · crawl4ai · FIXED · 0.8.9 · vulnerable: <= 0.8.8 · source

pip install --upgrade "crawl4ai>=0.8.9" pip show crawl4ai

Fedora 46 · mingw-qt5-qtwebkit · FIXED · 5.212.0-0.46.alpha4.fc46 · FEDORA-2026-46ae541c22 · source

sudo dnf upgrade --advisory=FEDORA-2026-46ae541c22

Fedora ELN · kdominate · FIXED · 26.08.2-2.eln159 · FEDORA-2026-b1d98239fd · source

sudo dnf upgrade --advisory=FEDORA-2026-b1d98239fd

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-6qhc-x826-342c
Nuclei scan template: crawl4ai < 0.8.9 - Server Side Request Forgery

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-2026-53755?

crawl4ai: upgrade to 0.8.9. Exact commands for each OS are on this page.

Is CVE-2026-53755 being exploited?

CVE-2026-53755 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-2026-53755 affect?

CVE-2026-53755 affects crawl4ai. Severity is high (CVSS 8.6). Crawl4AI is an open-source LLM friendly web crawler & scraper. Prior to 0.8.9, the Docker API server applied its SSRF destination check to the crawl target URL only, not to the proxy address. An unauthenticated request could supply a proxy

How urgent is CVE-2026-53755?

Priority 54/100. High severity; Remotely exploitable, no login, no user action

Software pages

Docker vulnerabilities

Related CVEs

CVE-2026-53753 CRITICAL 9.8 UPGRADE Crawl4AI is an open-source LLM friendly web crawler & scraper
CVE-2026-56266 HIGH 8.6 UPGRADE Crawl4AI before 0.8.7 contains a server-side request forgery vulnerability in the /crawl, /crawl/stream, /md,
CVE-2026-53754 HIGH 7.5 UPGRADE Crawl4AI is an open-source LLM friendly web crawler & scraper
CVE-2026-57572 CRITICAL 10.0 UPGRADE Crawl4AI is an open-source LLM-friendly web crawler and scraper
CVE-2026-57571 CRITICAL 9.6 UPGRADE Crawl4AI is an open-source LLM-friendly web crawler and scraper

References

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