CVE-2026-56265: Crawl4AI before 0.8.7 contains an authentication bypass vulnerability due to a hardcoded default JWT signing k

Q: How do I fix CVE-2026-56265?

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

Q: Is CVE-2026-56265 being exploited?

CVE-2026-56265 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-2026-56265 affect?

CVE-2026-56265 affects crawl4ai. Severity is critical (CVSS 9.8). Crawl4AI before 0.8.7 contains an authentication bypass vulnerability due to a hardcoded default JWT signing key in the Docker API server. Attackers who know the default key can forge valid authentication tokens for any user, bypassing auth

Q: How urgent is CVE-2026-56265?

Priority 67/100. Critical severity; CISA SSVC: public proof of concept; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2026-56265 is a critical-severity flaw (CVSS 9.8) 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 an authentication bypass vulnerability due to a hardcoded default JWT signing key in the Docker API server. Attackers who know the default key can forge valid authentication tokens for any user, bypassing authentication and gaining full access to protected functionality.

Why this priority

Critical severity
CISA SSVC: public proof of concept
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.6% (top 15%)
CISA exploited list	No
Weakness	CWE-798
Published	2026-06-21
Last modified	2026-06-26

Publisher (CNA): VulnCheck · Vendor: kidocode

Last updated 2026-06-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-21 14:16 UTCPublished CVE record published
2026-06-26 13:52 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.

Exact fixes by distribution

Python (pip) · crawl4ai · FIXED · 0.8.7 · vulnerable: < 0.8.7 · source

pip install --upgrade "crawl4ai>=0.8.7" pip show crawl4ai

Fedora 46 · python3.11 · FIXED · 3.11.18-1.fc46 · FEDORA-2026-cc775894f4 · source

sudo dnf upgrade --advisory=FEDORA-2026-cc775894f4

Public exploits and detection

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

Nuclei scan template: Crawl4AI < 0.8.7 - Hardcoded JWT Signing Key Authentication Bypass

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-2026-56265?

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

Is CVE-2026-56265 being exploited?

CVE-2026-56265 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-2026-56265 affect?

CVE-2026-56265 affects crawl4ai. Severity is critical (CVSS 9.8). Crawl4AI before 0.8.7 contains an authentication bypass vulnerability due to a hardcoded default JWT signing key in the Docker API server. Attackers who know the default key can forge valid authentication tokens for any user, bypassing auth

How urgent is CVE-2026-56265?

Priority 67/100. Critical severity; CISA SSVC: public proof of concept; CISA SSVC: automatable with total technical impact; 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-2026-53755 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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