{"answers":{"affected":"2 open source packages ship an affected version, including @prompty/core.","exploited":"There is no known exploitation of CVE-2026-53597 in the wild and no public exploit code.","fix":"Upgrade @prompty/core to 2.0.0-beta.3 or later.","what":"CVE-2026-53597 is a high-severity code injection vulnerability in microsoft prompty, published on 16 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-53597 and fix it if it is affected.\n\nWhat it is: CVE-2026-53597 is a high-severity code injection vulnerability in microsoft prompty, published on 16 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-53597 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- @prompty/core (npm): affected from 2.0.0-alpha.1; fixed in 2.0.0-beta.3\n- @prompty/core (npm): affected from 2.0.0-alpha.1; fixed in 2.0.0-beta.3\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-53597/ (Markdown: https://insights.sbomify.com/CVE-2026-53597/index.md)","id":"CVE-2026-53597","markdown":"https://insights.sbomify.com/CVE-2026-53597/index.md","name":"CVE-2026-53597","record":{"aliases":["GHSA-c4gh-rv8h-q9vw"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Prompty TypeScript loader","requires_auth":"none","summary":"Attackers can execute arbitrary JavaScript by crafting malicious .prompty files with executable frontmatter, affecting users of the Prompty TypeScript loader.","user_interaction":"required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-94","name":"Improper Control of Generation of Code"}],"description":"Prompty is a markdown file format (.prompty) for LLM prompts. From 2.0.0-alpha.1 until 2.0.0-beta.3, the @prompty/core TypeScript loader in runtime/typescript/packages/core/src/core/loader.ts used gray-matter without overriding executable js and javascript frontmatter engines, allowing an attacker-controlled .prompty file with ---js frontmatter to execute arbitrary JavaScript during prompt loading. This issue is fixed in version 2.0.0-beta.3.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Prompty: Arbitrary code execution via JavaScript frontmatter in TypeScript loader","id":"CVE-2026-53597","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"code_injection","year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"Prompty: Arbitrary File Read via ${file:path} Reference Expansion","id":"CVE-2026-53598"},"packages":[{"ecosystem":"npm","fixed":["2.0.0-beta.3"],"introduced":["2.0.0-alpha.1"],"last_affected":[],"package":"@prompty/core","purl":null,"source":"GHSA-c4gh-rv8h-q9vw"},{"ecosystem":"npm","fixed":["2.0.0-beta.3"],"introduced":["2.0.0-alpha.1"],"last_affected":[],"package":"@prompty/core","purl":"pkg:npm/%40prompty/core","source":"GHSA-c4gh-rv8h-q9vw"}],"prev":{"headline":"FreeScout has unrestricted file upload without rate limiting that leads to resource exhaustion (DoS)","id":"CVE-2026-53596"},"products":["prompty"],"published":"2026-07-16","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-18","vendors":["microsoft"]},"summary":"Attackers can execute arbitrary JavaScript by crafting malicious .prompty files with executable frontmatter, affecting users of the Prompty TypeScript loader.","url":"https://insights.sbomify.com/CVE-2026-53597/"}