{"answers":{"affected":"4 open source packages ship an affected version, including @prompty/core.","exploited":"There is no known exploitation of CVE-2026-73299 in the wild and no public exploit code.","fix":"Upgrade @prompty/core to a fixed version for your release line: 0.1.5 or 2.0.0-beta.5.","what":"CVE-2026-73299 is a critical code injection vulnerability in microsoft prompty, published on 12 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-73299 and fix it if it is affected.\n\nWhat it is: CVE-2026-73299 is a critical code injection vulnerability in microsoft prompty, published on 12 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-73299 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- @prompty/core (npm): affected all versions; fixed in 0.1.5\n- @prompty/core (npm): affected all versions; fixed in 0.1.5\n- @prompty/core (npm): affected from 2.0.0-alpha.1; fixed in 2.0.0-beta.5\n- @prompty/core (npm): affected from 2.0.0-alpha.1; fixed in 2.0.0-beta.5\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-2026-73299/ (Markdown: https://insights.sbomify.com/CVE-2026-73299/index.md)","id":"CVE-2026-73299","markdown":"https://insights.sbomify.com/CVE-2026-73299/index.md","name":"CVE-2026-73299","record":{"aliases":["GHSA-w28w-gp39-m4p6"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Prompty LLM library","requires_auth":"none","summary":"Attackers can execute arbitrary JavaScript in the host Node.js process via malicious Prompty templates due to unsafe Nunjucks rendering.","user_interaction":"not_required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":10,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-94","name":"Improper Control of Generation of Code"},{"id":"CWE-1336","name":"Improper Neutralization of Special Elements Used in a Template Engine"}],"description":"Prompty is a markdown file format (.prompty) for LLM prompts. Prior to 0.1.5 and 2.0.0-beta.5, the TypeScript Nunjucks renderer evaluated untrusted .prompty template bodies with unrestricted JavaScript member access. An attacker-controlled template could traverse constructor and prototype properties to execute JavaScript in the host Node.js process. This issue is fixed in versions 0.1.5 and 2.0.0-beta.5.","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":false,"headline":"Prompty: Server-Side Template Injection to Remote Code Execution in the @prompty/core Nunjucks Renderer","id":"CVE-2026-73299","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"code_injection","year":"2026"},"n_packages":4,"n_references":6,"next":{"headline":"Budibase: SQL Injection via `multipleStatements: true`","id":"CVE-2026-73300"},"packages":[{"ecosystem":"npm","fixed":["0.1.5"],"introduced":["0"],"last_affected":[],"package":"@prompty/core","purl":null,"source":"GHSA-w28w-gp39-m4p6"},{"ecosystem":"npm","fixed":["0.1.5"],"introduced":["0"],"last_affected":[],"package":"@prompty/core","purl":"pkg:npm/%40prompty/core","source":"GHSA-w28w-gp39-m4p6"},{"ecosystem":"npm","fixed":["2.0.0-beta.5"],"introduced":["2.0.0-alpha.1"],"last_affected":[],"package":"@prompty/core","purl":null,"source":"GHSA-w28w-gp39-m4p6"},{"ecosystem":"npm","fixed":["2.0.0-beta.5"],"introduced":["2.0.0-alpha.1"],"last_affected":[],"package":"@prompty/core","purl":"pkg:npm/%40prompty/core","source":"GHSA-w28w-gp39-m4p6"}],"prev":{"headline":"Microsoft Container Migration Solution Accelerator: Authenticated IDOR allowing read/write/delete processes","id":"CVE-2026-73298"},"products":["prompty"],"published":"2026-08-12","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":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-08-12","vendors":["microsoft"]},"summary":"Attackers can execute arbitrary JavaScript in the host Node.js process via malicious Prompty templates due to unsafe Nunjucks rendering.","url":"https://insights.sbomify.com/CVE-2026-73299/"}