{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/curl/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[{"cvss":4.3,"id":"CVE-2026-33534"},{"cvss":3.5,"id":"CVE-2026-33659"},{"cvss":8.6,"id":"CVE-2026-34160"},{"cvss":7.7,"id":"CVE-2026-34428"}],"_cs_exploited":false,"_cs_products":["cURL"],"_cs_severities":["high"],"_cs_tags":["vulnerability","curl"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eMultiple vulnerabilities have been identified in cURL, a widely used command-line tool and library for transferring data with URLs. An attacker exploiting these vulnerabilities could potentially bypass existing security measures, gain unauthorized access to sensitive information, or manipulate data transmitted via cURL. Due to the widespread use of cURL in various applications and systems, these vulnerabilities pose a significant risk. The specifics of these vulnerabilities are not detailed in this report, so defenders must be aware of cURL usage in their environments and prepared to respond to related exploitation attempts.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAn attacker identifies a vulnerable version of cURL being used in a target system or application.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a specific URL or request that triggers one of the cURL vulnerabilities.\u003c/li\u003e\n\u003cli\u003eDepending on the vulnerability, the attacker may bypass authentication mechanisms, allowing unauthorized access to protected resources.\u003c/li\u003e\n\u003cli\u003eThe attacker could potentially gain access to sensitive data transmitted through cURL, such as credentials, API keys, or confidential business information.\u003c/li\u003e\n\u003cli\u003eThe attacker might be able to modify data in transit, leading to data corruption or manipulation of application logic.\u003c/li\u003e\n\u003cli\u003eThe attacker could leverage the vulnerability to escalate privileges within the target system, potentially gaining administrative control.\u003c/li\u003e\n\u003cli\u003eUsing the compromised system, the attacker can move laterally within the network, accessing additional systems and data.\u003c/li\u003e\n\u003cli\u003eThe final objective could include data exfiltration, deployment of ransomware, or disruption of critical services.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eThe exploitation of these cURL vulnerabilities could lead to a range of severe consequences. Sensitive data breaches could expose confidential information, damage reputation, and lead to regulatory fines. Successful attacks could disrupt critical business operations, leading to financial losses and service outages. The lack of specific details prevents quantifying the scope of potential damage, but the ubiquity of cURL suggests widespread risk.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMonitor network traffic for unusual patterns of cURL usage, particularly those involving potentially malicious URLs (see example Sigma rule below).\u003c/li\u003e\n\u003cli\u003eImplement strict input validation and sanitization to prevent malicious URLs from being processed by cURL in web applications (mitigation - not detectable via SIEM).\u003c/li\u003e\n\u003cli\u003eRegularly update cURL to the latest version to patch known vulnerabilities (mitigation - not detectable via SIEM).\u003c/li\u003e\n\u003cli\u003eReview application logs for errors or unusual behavior related to cURL, which could indicate exploitation attempts (enable webserver logging to activate the rules below).\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-29T10:54:08Z","date_published":"2026-04-29T10:54:08Z","id":"/briefs/2026-04-curl-multiple-vulnerabilities/","summary":"Multiple vulnerabilities in cURL could allow an attacker to bypass security measures, disclose confidential information, or manipulate data.","title":"Multiple Vulnerabilities in cURL","url":"https://feed.craftedsignal.io/briefs/2026-04-curl-multiple-vulnerabilities/"},{"_cs_actors":[],"_cs_cves":[],"_cs_exploited":false,"_cs_products":[],"_cs_severities":["medium"],"_cs_tags":["curl","vulnerability","file-manipulation"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eA vulnerability exists in cURL that allows a remote, anonymous attacker to manipulate files. The BSI advisory indicates that this vulnerability could be exploited without authentication, potentially leading to unauthorized modifications of sensitive data or system configuration. While the specific details of the vulnerability and exploitation methods are not provided in the advisory, the potential for file manipulation highlights the importance of timely patching and monitoring of cURL installations. This vulnerability impacts systems using the affected versions of cURL, potentially affecting a wide range of applications and services.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker identifies a vulnerable system running an affected version of cURL.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious request to exploit the cURL vulnerability. Due to the lack of specifics in the advisory, the nature of this request is unknown, but may involve specially crafted URLs or command-line arguments.\u003c/li\u003e\n\u003cli\u003ecURL processes the malicious request, triggering the vulnerability. This could involve writing to unintended file paths or modifying file contents.\u003c/li\u003e\n\u003cli\u003eThe attacker leverages the vulnerability to modify critical system files.\u003c/li\u003e\n\u003cli\u003eThe attacker uses the file manipulation to gain unauthorized access or escalate privileges.\u003c/li\u003e\n\u003cli\u003eThe attacker maintains persistence on the compromised system.\u003c/li\u003e\n\u003cli\u003eThe attacker performs malicious activities such as data exfiltration or denial of service.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of this cURL vulnerability could lead to unauthorized file modifications, potentially affecting system stability, data integrity, and confidentiality. The scope of the impact depends on the specific files manipulated by the attacker. System compromise and data breaches are potential consequences.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMonitor network traffic for suspicious cURL activity, specifically command line arguments that attempt to write to or modify system files. Use the process creation rule below to identify unusual invocations (Rules: \u0026ldquo;Detect Suspicious cURL File Writes\u0026rdquo;).\u003c/li\u003e\n\u003cli\u003eUpdate cURL to the latest version to remediate any known vulnerabilities after vendor releases a patch.\u003c/li\u003e\n\u003cli\u003eImplement file integrity monitoring (FIM) to detect unauthorized changes to critical system files.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-03-24T10:25:51Z","date_published":"2026-03-24T10:25:51Z","id":"/briefs/2026-03-curl-file-manipulation/","summary":"A remote, anonymous attacker can exploit a vulnerability in cURL to manipulate files on a vulnerable system.","title":"cURL Vulnerability Allows File Manipulation","url":"https://feed.craftedsignal.io/briefs/2026-03-curl-file-manipulation/"}],"language":"en","title":"CraftedSignal Threat Feed — Curl","version":"https://jsonfeed.org/version/1.1"}