CVE-2026-56263: Crawl4AI before 0.8.7 contains a stored cross-site scripting vulnerability in the monitor dashboard that rende

Q: How do I fix CVE-2026-56263?

crawl4ai: upgrade to 0.8.7. Exact commands for each OS are on this page.

Q: Is CVE-2026-56263 being exploited?

CVE-2026-56263 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-2026-56263 affect?

CVE-2026-56263 affects crawl4ai. Severity is medium (CVSS 6.1). Crawl4AI before 0.8.7 contains a stored cross-site scripting vulnerability in the monitor dashboard that renders crawl URLs and error messages via innerHTML without escaping. An attacker can submit a crafted crawl request with malicious mar

Q: How urgent is CVE-2026-56263?

Priority 28/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2026-56263 is a medium-severity flaw (CVSS 6.1) affecting crawl4ai. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Crawl4AI before 0.8.7 contains a stored cross-site scripting vulnerability in the monitor dashboard that renders crawl URLs and error messages via innerHTML without escaping. An attacker can submit a crafted crawl request with malicious markup that executes in an operator's browser when viewing the dashboard.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 72%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-06-23
Last modified	2026-06-25

Publisher (CNA): VulnCheck · Vendor: kidocode

Last updated 2026-06-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-23 13:16 UTCPublished CVE record published
2026-06-25 18:39 UTCUpdated Record last modified

kidocode crawl4ai UPGRADE

Affected: < 0.8.7

Fixed in: 0.8.7

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 0.8.7 (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.

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-2026-56263?

crawl4ai: upgrade to 0.8.7. Exact commands for each OS are on this page.

Is CVE-2026-56263 being exploited?

CVE-2026-56263 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-2026-56263 affect?

CVE-2026-56263 affects crawl4ai. Severity is medium (CVSS 6.1). Crawl4AI before 0.8.7 contains a stored cross-site scripting vulnerability in the monitor dashboard that renders crawl URLs and error messages via innerHTML without escaping. An attacker can submit a crafted crawl request with malicious mar

How urgent is CVE-2026-56263?

Priority 28/100. No elevated risk signals yet.

Related CVEs

CVE-2026-53753 CRITICAL 9.8 UPGRADE Crawl4AI is an open-source LLM friendly web crawler & scraper
CVE-2026-53755 HIGH 8.6 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

References

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