Vulnerability · Published Jul 12, 2026 · Assigned by VulnCheck

CVE-2026-56259Crawl4AI - LLM Credential Exfiltration via base_url and Environment Variable Resolution

High 8.2

In plain English

A high-severity information exposure in Crawl4AI from Crawl4AI. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.2High

Exploit odds (30 days)0.4%top 62.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	crawl4ai	0.8.8	GHSA-f989-c77f-r2cq
PyPI	crawl4ai	0.8.8	PYSEC-2026-3448

Affected products (as reported)

Vendor	Product	Versions
Crawl4AI	Crawl4AI	0 – before 0.8.8

Weakness: CWE-200 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

References

GitHub Security Advisory (GHSA-f989-c77f-r2cq) vendor-advisory
VulnCheck Advisory: Crawl4AI - LLM Credential Exfiltration via base_url and Environment Variable Resolution third-party-advisory