{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cve-2026-44973/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["go-billy/v5","go-billy/v6"],"_cs_severities":["high"],"_cs_tags":["path-traversal","go-billy","CVE-2026-44973"],"_cs_type":"advisory","_cs_vendors":["go-git"],"content_html":"\u003cp\u003eThe \u003ccode\u003ego-billy\u003c/code\u003e library has multiple path traversal vulnerabilities due to insufficient path sanitization and boundary enforcement. Crafted paths, particularly using \u003ccode\u003e..\u003c/code\u003e, can escape the intended base directories. The \u003ccode\u003eosfs.ChrootOS\u003c/code\u003e implementation is affected and has been deprecated in \u003ccode\u003ev5\u003c/code\u003e and removed in \u003ccode\u003ev6\u003c/code\u003e. Applications relying on \u003ccode\u003ego-billy\u003c/code\u003e for some level of isolation may inadvertently expose access to unintended filesystem locations. Users requiring stronger security boundary enforcement are advised to upgrade to \u003ccode\u003ev6\u003c/code\u003e, where the \u003ccode\u003eosfs\u003c/code\u003e implementation is backed by the traversal-resistant primitive \u003ccode\u003eos.Root\u003c/code\u003e. Versions prior to \u003ccode\u003ev5\u003c/code\u003e are likely affected; upgrading to a supported version is recommended. The vulnerability is identified as CVE-2026-44973.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAn attacker crafts a malicious path using directory traversal sequences (e.g., \u003ccode\u003e../\u003c/code\u003e) designed to escape the intended file system boundaries.\u003c/li\u003e\n\u003cli\u003eThe application using \u003ccode\u003ego-billy\u003c/code\u003e receives the crafted path, intending to access a file within a restricted directory.\u003c/li\u003e\n\u003cli\u003eThe application calls \u003ccode\u003ego-billy\u003c/code\u003e functions (e.g., \u003ccode\u003eOpen\u003c/code\u003e, \u003ccode\u003eReadFile\u003c/code\u003e, \u003ccode\u003eStat\u003c/code\u003e) to interact with the file system using the attacker-controlled path.\u003c/li\u003e\n\u003cli\u003eDue to insufficient sanitization within the vulnerable \u003ccode\u003eosfs.ChrootOS\u003c/code\u003e implementation, the traversal sequences are not properly resolved or blocked.\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003ego-billy\u003c/code\u003e\u0026rsquo;s file system access functions resolve the path, allowing the attacker to navigate outside the intended directory and access sensitive files or directories.\u003c/li\u003e\n\u003cli\u003eThe application reads or modifies files outside the intended scope, leading to potential information disclosure or arbitrary file manipulation.\u003c/li\u003e\n\u003cli\u003eThe attacker gains unauthorized access to sensitive data or system resources.\u003c/li\u003e\n\u003cli\u003eThe attacker may further exploit the compromised system to achieve lateral movement or other malicious objectives.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of these path traversal vulnerabilities can lead to unauthorized access to sensitive files and directories, potentially resulting in information disclosure or arbitrary file manipulation. The number of victims and targeted sectors depend on the specific applications using the vulnerable \u003ccode\u003ego-billy\u003c/code\u003e library. If the attack succeeds, attackers can bypass intended security boundaries, read configuration files, or even modify critical system files, leading to complete system compromise.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUpgrade to \u003ccode\u003ego-billy\u003c/code\u003e version 6 or later to leverage the more secure \u003ccode\u003eos.Root\u003c/code\u003e implementation for \u003ccode\u003eosfs\u003c/code\u003e to prevent CVE-2026-44973.\u003c/li\u003e\n\u003cli\u003eMigrate away from \u003ccode\u003eosfs.ChrootOS\u003c/code\u003e and use \u003ccode\u003eosfs.BoundOS\u003c/code\u003e instead, as \u003ccode\u003eosfs.ChrootOS\u003c/code\u003e is deprecated and vulnerable as noted in the overview.\u003c/li\u003e\n\u003cli\u003eEnable process creation logging on affected systems to facilitate detection of suspicious file access patterns.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-14T18:27:56Z","date_published":"2026-05-14T18:27:56Z","id":"https://feed.craftedsignal.io/briefs/2026-05-go-billy-path-traversal/","summary":"Multiple path traversal vulnerabilities exist in go-billy, particularly affecting the `osfs.ChrootOS` implementation, where crafted paths can escape intended base directories due to insufficient path sanitization and boundary enforcement; users requiring stronger security should upgrade to v6 and use `os.Root`.","title":"go-billy Path Traversal Vulnerabilities","url":"https://feed.craftedsignal.io/briefs/2026-05-go-billy-path-traversal/"}],"language":"en","title":"CraftedSignal Threat Feed — CVE-2026-44973","version":"https://jsonfeed.org/version/1.1"}