{"answers":{"affected":"1 open source package ship an affected version, including power-apps.","exploited":"There is no known exploitation of MAL-2026-4274 in the wild and no public exploit code.","fix":"Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.","what":"MAL-2026-4274 is a malicious package in power-apps, published on 24 May 2026."},"fix_prompt":"MAL-2026-4274 is a malicious package: power-apps (npm). Every version was published to cause harm.\n\nTask:\n1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.\n2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.\n3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.\n4. If the package is not used anywhere, say so and change nothing.\n\nReference: https://insights.sbomify.com/MAL-2026-4274/ (Markdown: https://insights.sbomify.com/MAL-2026-4274/index.md)","id":"MAL-2026-4274","markdown":"https://insights.sbomify.com/MAL-2026-4274/index.md","name":"MAL-2026-4274","record":{"aliases":["GHSA-hgc9-p5mp-p8f6"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"On `npm install`, postinstall.js executes `whoami`, `id`, and reads `os.hostname()`, `os.platform()`, `process.cwd()`, and CI/GitHub environment variables, then sends the collected data as query-string parameters via HTTPS GET to `br6o3tu4m5amvthw08w8o1x0srykmia7.oastify.com` (a Burp Collaborator out-of-band callback domain). The script also performs a DNS lookup of `\u003cwhoami\u003e.\u003ccallback-host\u003e` as a secondary exfiltration channel. The package name impersonates Microsoft Power Apps and the request path includes `/microsft` (sic), indicating supply-chain reconnaissance against developers searching for Microsoft Power Apps tooling. Installing this package on a developer workstation or CI runner leaks host identity and pipeline environment metadata to an attacker-controlled collaborator endpoint.\n\nAny computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.\n\nThe OpenSSF Package Analysis project identified 'power-apps' @ 2.0.4 (npm) as malicious.\n\nIt is considered malicious because:\n\n- The package communicates with a domain associated with malicious activity.\n\n- The package executes one or more commands associated with malicious behavior.","ecosystems":["npm"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":false,"headline":"Malicious code in power-apps (npm)","id":"MAL-2026-4274","indexable":true,"kev":null,"kind":"malicious","links":{"ecosystem":"npm","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"npm","fixed":[],"introduced":["0"],"last_affected":[],"package":"power-apps","purl":"pkg:npm/power-apps","source":"MAL-2026-4274"}],"products":null,"published":"2026-05-24","related":[],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"OpenSSF Malicious Packages","prefix":"MAL"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":null,"url":"https://insights.sbomify.com/MAL-2026-4274/"}