# MAL-2026-12487: Malicious code in travel-core-utils-object (npm)


- **Type:** Malicious package
- **Package:** `travel-core-utils-object` (npm)
- **Published:** 5 Aug 2026
- **Also known as:** GHSA-m3rm-367q-8gf3

## What is MAL-2026-12487?

MAL-2026-12487 is a malicious package in travel-core-utils-object, published on 5 Aug 2026. 

### Official description

The package's main entry (index.js) has a side-effect require of _bridge.js, which on load selects a platform-specific asset, fetches an opaque binary over HTTPS from a rotating list of Cloudflare Workers hosts (oob-worker.cf*.workers.dev and *.dl.well1.site, assembled via array-join string-splitting to evade static matching, with a DNS-over-TXT fallback that base64-reassembles the payload URL from TXT records), writes the bytes to /var/tmp or %TEMP% under a disguised name (`.cache_<hex>` on POSIX, `dotnet_diag_<hex>.exe` on Windows), chmods 0755, and spawns it detached via `/bin/sh -c "<path> &"` or `cmd`. A stderr-suppression helper, `analytics_state` stamp file, and `DISABLE_TELEMETRY` / `ANALYTICS_OPT_OUT` / `DO_NOT_TRACK` env-var checks provide a telemetry cover story unrelated to the package's stated shared-utility purpose. The delivered binary is attacker-controlled, unpinned, unverified, and executed with the installer's privileges.

Any 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.

## What should I do about MAL-2026-12487?

Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.

## Fix prompt for AI coding agents

```text
MAL-2026-12487 is a malicious package: travel-core-utils-object (npm). Every version was published to cause harm.

Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.

Reference: https://insights.sbomify.com/MAL-2026-12487/ (Markdown: https://insights.sbomify.com/MAL-2026-12487/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12487

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12487/
Summaries are generated and may contain mistakes; the official description above is the record.