Information disclosure in Crawl4ai
CVE-2026-56259
Crawl4AI before 0.8.8 contains credential exfiltration vulnerabilities in the Docker API server that allow attackers to redirect LLM API calls to attacker-controlled endpoints and read arbitrary environment variables. Attackers can exploit the unauthenticated /md, /llm, and /llm/job endpoints by supplying a malicious base_url parameter and setting api_token to env:VARIABLE_NAME to exfiltrate provider API keys and server secrets including JWT SECRET_KEY for authentication bypass.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (35.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Crawl4ai — versions 0, 0.8.8
- Kidocode Crawl4ai
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-f989-c77f-r2cq) (vendor-advisory, Mitigation, Vendor Advisory)
- VulnCheck Advisory: Crawl4AI - LLM Credential Exfiltration via base_url and Environment Variable Resolution (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-56259?
- CVE-2026-56259 is a high-severity vulnerability in Crawl4ai, classified under Information Disclosure. CVSS score: 8.2/10. Published 2026-07-12.
- How severe is CVE-2026-56259?
- High severity. CVSS v3 base score is 8.2 out of 10.