{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/products/prompty.core-nuget--2.0.0-beta.1/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":7.5,"id":"CVE-2026-53598"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["prompty (PyPI) \u003c= 2.0.0b1","@prompty/core (npm) \u003c= 2.0.0-beta.1","prompty (crates.io) \u003c= 2.0.0-beta.1","Prompty.Core (NuGet) \u003c= 2.0.0-beta.1"],"_cs_severities":["high"],"_cs_tags":["arbitrary-file-read","path-traversal","code-execution","prompty"],"_cs_type":"advisory","_cs_vendors":["Prompty"],"content_html":"\u003cp\u003eCVE-2026-53598 describes an arbitrary file read vulnerability affecting Prompty libraries across multiple ecosystems, including PyPI \u003ccode\u003eprompty\u003c/code\u003e (versions \u003ccode\u003e\u0026lt;= 2.0.0b1\u003c/code\u003e), npm \u003ccode\u003e@prompty/core\u003c/code\u003e (versions \u003ccode\u003e\u0026lt;= 2.0.0-beta.1\u003c/code\u003e), crates.io \u003ccode\u003eprompty\u003c/code\u003e (versions \u003ccode\u003e\u0026lt;= 2.0.0-beta.1\u003c/code\u003e), and NuGet \u003ccode\u003ePrompty.Core\u003c/code\u003e (versions \u003ccode\u003e\u0026lt;= 2.0.0-beta.1\u003c/code\u003e). This flaw stems from improper validation of \u003ccode\u003e${file:...}\u003c/code\u003e references within \u003ccode\u003e.prompty\u003c/code\u003e frontmatter, allowing path traversal (\u003ccode\u003e../\u003c/code\u003e) or absolute paths to read files outside the intended directory. Threat actors could exploit this by providing a specially crafted \u003ccode\u003e.prompty\u003c/code\u003e file to a vulnerable application, leading to the disclosure of sensitive local files accessible to the application's process. The vulnerability was patched in versions \u003ccode\u003e2.0.0b2\u003c/code\u003e and \u003ccode\u003e2.0.0-beta.2\u003c/code\u003e, which enforce stricter path restrictions and canonicalization.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAn attacker crafts a malicious \u003ccode\u003e.prompty\u003c/code\u003e file containing a \u003ccode\u003e${file:...}\u003c/code\u003e reference with a path traversal sequence (e.g., \u003ccode\u003e${file:../etc/passwd}\u003c/code\u003e) or an absolute path (e.g., \u003ccode\u003e${file:/etc/shadow}\u003c/code\u003e) in its frontmatter.\u003c/li\u003e\n\u003cli\u003eThe attacker delivers this malicious \u003ccode\u003e.prompty\u003c/code\u003e file to a vulnerable application or convinces a victim to load it, targeting applications using PyPI \u003ccode\u003eprompty\u003c/code\u003e (\u0026lt;= 2.0.0b1), npm \u003ccode\u003e@prompty/core\u003c/code\u003e (\u0026lt;= 2.0.0-beta.1), crates.io \u003ccode\u003eprompty\u003c/code\u003e (\u0026lt;= 2.0.0-beta.1), or NuGet \u003ccode\u003ePrompty.Core\u003c/code\u003e (\u0026lt;= 2.0.0-beta.1).\u003c/li\u003e\n\u003cli\u003eThe vulnerable application loads the untrusted \u003ccode\u003e.prompty\u003c/code\u003e file, which includes the frontmatter containing the crafted file reference.\u003c/li\u003e\n\u003cli\u003eThe Prompty loader attempts to expand the \u003ccode\u003e${file:...}\u003c/code\u003e reference during processing without properly validating the resolved path against authorized directories or canonicalizing it.\u003c/li\u003e\n\u003cli\u003eThe Prompty library's internal logic resolves the path traversal or absolute path, causing the application to read the arbitrary file from the host system.\u003c/li\u003e\n\u003cli\u003eThe content of the sensitive file (e.g., \u003ccode\u003e/etc/passwd\u003c/code\u003e, \u003ccode\u003e/etc/shadow\u003c/code\u003e, configuration files) is then processed by the application.\u003c/li\u003e\n\u003cli\u003eThe application may log the content, include it in a response, or otherwise expose it, allowing the attacker to receive or extract the contents of the arbitrary file.\u003c/li\u003e\n\u003cli\u003eThe attacker achieves sensitive information disclosure, obtaining unauthorized access to local system files.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eApplications that process untrusted \u003ccode\u003e.prompty\u003c/code\u003e files are at severe risk of arbitrary file disclosure due to CVE-2026-53598. Successful exploitation could lead to attackers reading any file accessible to the vulnerable application's process, including critical configuration files, user credentials, application source code, or sensitive private data. While no specific victim counts are provided, any organization utilizing affected Prompty versions in environments that parse external or user-provided prompt files is vulnerable to significant information theft. The potential damage includes intellectual property loss, system compromise through leaked credentials, and privacy breaches if personal data is exposed.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUpgrade all PyPI \u003ccode\u003eprompty\u003c/code\u003e installations to version \u003ccode\u003e2.0.0b2\u003c/code\u003e or higher immediately to remediate CVE-2026-53598.\u003c/li\u003e\n\u003cli\u003eUpgrade all npm \u003ccode\u003e@prompty/core\u003c/code\u003e installations to \u003ccode\u003e2.0.0-beta.2\u003c/code\u003e or higher immediately to remediate CVE-2026-53598.\u003c/li\u003e\n\u003cli\u003eUpgrade all crates.io \u003ccode\u003eprompty\u003c/code\u003e installations to \u003ccode\u003e2.0.0-beta.2\u003c/code\u003e or higher immediately to remediate CVE-2026-53598.\u003c/li\u003e\n\u003cli\u003eUpgrade all NuGet \u003ccode\u003ePrompty.Core\u003c/code\u003e installations to \u003ccode\u003e2.0.0-beta.2\u003c/code\u003e or higher immediately to remediate CVE-2026-53598.\u003c/li\u003e\n\u003cli\u003eReview application logs for CVE-2026-53598 exploitation attempts, specifically looking for \u003ccode\u003eprompty\u003c/code\u003e library operations attempting to access files outside expected asset directories.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-07-17T19:47:13Z","date_published":"2026-07-17T19:47:13Z","id":"https://feed.craftedsignal.io/briefs/2026-07-prompty-arbitrary-file-read/","summary":"A path traversal vulnerability, CVE-2026-53598, in Prompty loaders allows an attacker-controlled `.prompty` file to read arbitrary files accessible to the host application process due to improper validation of `${file:...}` references in frontmatter, leading to sensitive local file disclosure.","title":"Prompty Arbitrary File Read Vulnerability via File Reference Expansion (CVE-2026-53598)","url":"https://feed.craftedsignal.io/briefs/2026-07-prompty-arbitrary-file-read/"}],"language":"en","title":"CraftedSignal Threat Feed - Prompty.Core (NuGet) \u003c= 2.0.0-Beta.1","version":"https://jsonfeed.org/version/1.1"}