{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/products/picklescan-before-0.0.34/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":8.1,"id":"CVE-2025-71375"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["picklescan (before 0.0.34)"],"_cs_severities":["high"],"_cs_tags":["vulnerability","rce","deserialization","python","picklescan"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eA critical vulnerability, tracked as CVE-2025-71375, has been identified in the \u003ccode\u003epicklescan\u003c/code\u003e Python library, affecting all versions before 0.0.34. This flaw allows malicious actors to bypass security checks designed to detect harmful code within Python pickle files. Specifically, \u003ccode\u003epicklescan\u003c/code\u003e fails to recognize the \u003ccode\u003e_operator.methodcaller\u003c/code\u003e built-in function as a potential threat vector. Attackers can leverage this oversight to embed arbitrary code within a pickle payload. When such a specially crafted payload is subsequently loaded by an application using Python's standard \u003ccode\u003epickle.load()\u003c/code\u003e function, the embedded malicious code will execute, leading to potential system compromise. This vulnerability is significant for organizations that process or share Python pickle files and rely on \u003ccode\u003epicklescan\u003c/code\u003e for their security posture.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker crafts a malicious Python pickle payload, meticulously designed to leverage the \u003ccode\u003e_operator.methodcaller\u003c/code\u003e built-in function to embed arbitrary code.\u003c/li\u003e\n\u003cli\u003eThe malicious pickle payload is delivered to a target system, potentially as part of an uploaded file, a network stream, or a malicious data artifact exchanged between services.\u003c/li\u003e\n\u003cli\u003eA system or application utilizing the \u003ccode\u003epicklescan\u003c/code\u003e library (version prior to 0.0.34) attempts to scan the received pickle file for malicious content to ensure its safety before processing.\u003c/li\u003e\n\u003cli\u003eDue to the vulnerability (CVE-2025-71375), \u003ccode\u003epicklescan\u003c/code\u003e fails to identify the \u003ccode\u003e_operator.methodcaller\u003c/code\u003e based malicious code within the pickle payload, allowing it to be marked as \u0026quot;safe\u0026quot; or undetected.\u003c/li\u003e\n\u003cli\u003eThe legitimate application or service then proceeds to load the unsanitized (and still malicious) pickle file into memory using Python's \u003ccode\u003epickle.load()\u003c/code\u003e function.\u003c/li\u003e\n\u003cli\u003eUpon deserialization, the \u003ccode\u003e_operator.methodcaller\u003c/code\u003e embedded in the pickle payload triggers the execution of the attacker's arbitrary code within the context and privileges of the vulnerable application.\u003c/li\u003e\n\u003cli\u003eThe attacker achieves arbitrary code execution, which can lead to data exfiltration, system compromise, establishment of persistence, or further network pivoting within the victim's environment.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eThe successful exploitation of CVE-2025-71375 grants attackers arbitrary code execution capabilities on the affected system. This can lead to severe consequences, including full system compromise, sensitive data exfiltration, denial of service, or the deployment of further malware such as ransomware. While no specific victim count or targeted sectors are mentioned, any organization or developer using \u003ccode\u003epicklescan\u003c/code\u003e before version 0.0.34 to sanitize Python pickle files is at risk. The CVSS v3.1 base score of 8.1 (High) underscores the critical nature of this vulnerability, highlighting that it can be exploited remotely without authentication, requiring only user interaction (e.g., loading the malicious pickle).\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePatch CVE-2025-71375 immediately by upgrading the \u003ccode\u003epicklescan\u003c/code\u003e library to version 0.0.34 or higher in all development, staging, and production environments.\u003c/li\u003e\n\u003cli\u003eImplement strong input validation and deserialization policies, assuming any untrusted pickle file, even those scanned by vulnerable versions of \u003ccode\u003epicklescan\u003c/code\u003e, may contain malicious code.\u003c/li\u003e\n\u003cli\u003eReview existing codebases for instances of \u003ccode\u003epickle.load()\u003c/code\u003e being used on data from untrusted sources, even if processed by \u003ccode\u003epicklescan\u003c/code\u003e.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-07-04T02:30:22Z","date_published":"2026-07-04T02:30:22Z","id":"https://feed.craftedsignal.io/briefs/2026-07-picklescan-cve-2025-71375/","summary":"A vulnerability in `picklescan` versions prior to 0.0.34 (CVE-2025-71375) allows attackers to craft malicious Python pickle payloads using the `_operator.methodcaller` built-in function, which evades detection by the `picklescan` library and enables arbitrary code execution when the payload is loaded by an application using `pickle.load()`.","title":"CVE-2025-71375: Picklescan Arbitrary Code Execution via _operator.methodcaller Evasion","url":"https://feed.craftedsignal.io/briefs/2026-07-picklescan-cve-2025-71375/"}],"language":"en","title":"CraftedSignal Threat Feed - Picklescan (Before 0.0.34)","version":"https://jsonfeed.org/version/1.1"}