{"answers":{"affected":"1 open source package ship an affected version, including @mastra/agent-browser.","exploited":"There is no known exploitation of MAL-2026-5996 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-2026-5996 is a malicious package in @mastra/agent-browser, published on 17 Jun 2026."},"fix_prompt":"MAL-2026-5996 is a malicious package: @mastra/agent-browser (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-2026-5996/ (Markdown: https://insights.sbomify.com/MAL-2026-5996/index.md)","id":"MAL-2026-5996","markdown":"https://insights.sbomify.com/MAL-2026-5996/index.md","name":"MAL-2026-5996","record":{"aliases":["GHSA-ph9v-3f5h-hg6p"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"@mastra/agent-browser@0.3.2 declares a dependency on 'easy-day-js@^1.11.21' in package.json, but the package's own compiled code in dist/index.js never imports or references easy-day-js (only @mastra/core, agent-browser, and zod are used). The dependency name resembles the popular 'dayjs' library and pulling it in at install time means every installer of @mastra/agent-browser also fetches and executes whatever easy-day-js contains. The wrapper package's own code shows no install hooks, no obfuscation, and no exfiltration behavior, so the installer-side risk depends entirely on the contents of easy-day-js. Routing to human review so the transitive can be evaluated and, if malicious, both packages handled together.\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.","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 @mastra/agent-browser (npm)","id":"MAL-2026-5996","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":[],"last_affected":[],"package":"@mastra/agent-browser","purl":"pkg:npm/%40mastra/agent-browser","source":"MAL-2026-5996"}],"products":null,"published":"2026-06-17","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-2026-5996/"}