{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/products/crawl4ai-before-0.8.8/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":8.2,"id":"CVE-2026-56259"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Crawl4AI before 0.8.8"],"_cs_severities":["high"],"_cs_tags":["vulnerability","credential-access","defense-evasion","exfiltration","cloud"],"_cs_type":"advisory","_cs_vendors":["Crawl4AI"],"content_html":"\u003cp\u003eCrawl4AI versions before 0.8.8 are affected by CVE-2026-56259, a critical credential exfiltration vulnerability residing in its Docker API server. This vulnerability allows unauthenticated attackers to redirect Large Language Model (LLM) API calls to arbitrary attacker-controlled endpoints and read sensitive environment variables. By targeting the \u003ccode\u003e/md\u003c/code\u003e, \u003ccode\u003e/llm\u003c/code\u003e, and \u003ccode\u003e/llm/job\u003c/code\u003e endpoints and crafting specific requests with a malicious \u003ccode\u003ebase_url\u003c/code\u003e and an \u003ccode\u003eapi_token\u003c/code\u003e set to \u003ccode\u003eenv:VARIABLE_NAME\u003c/code\u003e, adversaries can exfiltrate critical data such as provider API keys and the JWT SECRET_KEY. Successful exploitation grants attackers the ability to bypass authentication mechanisms and potentially gain unauthorized access to LLM services or internal systems, making it a significant threat to organizations utilizing Crawl4AI.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003e\u003cstrong\u003eReconnaissance\u003c/strong\u003e: An attacker identifies an internet-exposed Crawl4AI instance running a version prior to 0.8.8, particularly observing its Docker API server functionality.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eInitial Access\u003c/strong\u003e: The attacker sends an unauthenticated HTTP request to one of the vulnerable Docker API server endpoints, specifically \u003ccode\u003e/md\u003c/code\u003e, \u003ccode\u003e/llm\u003c/code\u003e, or \u003ccode\u003e/llm/job\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eURL Manipulation\u003c/strong\u003e: The attacker includes a \u003ccode\u003ebase_url\u003c/code\u003e parameter in the request, pointing it to an attacker-controlled server or endpoint, effectively initiating a Server-Side Request Forgery (SSRF).\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eCredential Targeting\u003c/strong\u003e: Simultaneously, the attacker sets the \u003ccode\u003eapi_token\u003c/code\u003e parameter to \u003ccode\u003eenv:VARIABLE_NAME\u003c/code\u003e, specifying the name of a desired environment variable (e.g., \u003ccode\u003eenv:JWT_SECRET_KEY\u003c/code\u003e, \u003ccode\u003eenv:OPENAI_API_KEY\u003c/code\u003e).\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eData Exfiltration\u003c/strong\u003e: The vulnerable Crawl4AI instance, processing the malicious request, makes an outbound API call to the attacker-controlled \u003ccode\u003ebase_url\u003c/code\u003e, inadvertently embedding the value of the specified environment variable within the request sent to the attacker.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eInformation Collection\u003c/strong\u003e: The attacker's server receives the outbound request from Crawl4AI, capturing the exfiltrated environment variable.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eAuthentication Bypass/Abuse\u003c/strong\u003e: With the exfiltrated JWT SECRET_KEY or provider API keys, the attacker can forge authentication tokens to bypass access controls or directly utilize the API keys for unauthorized access to LLM services.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eThe successful exploitation of CVE-2026-56259 leads to severe consequences including the exfiltration of sensitive environment variables such as API keys for LLM providers and the JWT SECRET_KEY. This can directly result in authentication bypass, allowing attackers to gain unauthorized access to Crawl4AI functionalities, connected LLM services, or other internal systems protected by these credentials. The impact extends to potential financial losses due to compromised API keys, data breaches involving information processed by LLMs, and unauthorized use of cloud resources or services associated with the exfiltrated credentials.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eImmediately patch Crawl4AI installations to version 0.8.8 or newer to remediate \u003ca href=\"https://nvd.nist.gov/vuln/detail/CVE-2026-56259\"\u003eCVE-2026-56259\u003c/a\u003e.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule provided in this brief to your SIEM to detect exploitation attempts targeting Crawl4AI's Docker API server.\u003c/li\u003e\n\u003cli\u003eReview web server access logs for any suspicious requests to \u003ccode\u003e/md\u003c/code\u003e, \u003ccode\u003e/llm\u003c/code\u003e, or \u003ccode\u003e/llm/job\u003c/code\u003e endpoints that contain \u003ccode\u003ebase_url\u003c/code\u003e and \u003ccode\u003eapi_token=env:\u003c/code\u003e patterns.\u003c/li\u003e\n\u003cli\u003eImplement strict network segmentation and access control lists (ACLs) to limit external access to Crawl4AI Docker API server endpoints and monitor for unusual outbound network connections from Crawl4AI instances.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-07-12T12:22:58Z","date_published":"2026-07-12T12:22:58Z","id":"https://feed.craftedsignal.io/briefs/2026-07-crawl4ai-credential-exfiltration/","summary":"A critical vulnerability, CVE-2026-56259, in Crawl4AI versions prior to 0.8.8 allows attackers to exploit unauthenticated Docker API server endpoints by manipulating the `base_url` and `api_token` parameters, leading to credential exfiltration and authentication bypass.","title":"Crawl4AI Credential Exfiltration and Authentication Bypass Vulnerabilities","url":"https://feed.craftedsignal.io/briefs/2026-07-crawl4ai-credential-exfiltration/"}],"language":"en","title":"CraftedSignal Threat Feed - Crawl4AI Before 0.8.8","version":"https://jsonfeed.org/version/1.1"}