Which versions of @outmarket/ui are malicious?

The following npm versions of @outmarket/ui are flagged malicious: 9.9.9. Treat any of these as compromised.

How do I remediate @outmarket/ui if I installed it?

@outmarket/ui is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

I already installed @outmarket/ui — how do I know if it already compromised me?

If @outmarket/ui was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Is @outmarket/ui part of a known attack campaign?

Yes — @outmarket/ui is associated with the IN-MAL-2026-007207 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find @outmarket/ui across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for @outmarket/ui (version 9.9.9).

Malicious package

@outmarket/uinpm

Advisory published Jun 23, 2026Updated Jun 23, 2026

@outmarket/ui is a confirmed malicious npm package (MAL-2026-6291) that steals credentials and exfiltrates sensitive data (malicious version 9.9.9). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in @outmarket/ui (npm)

MAL-2026-6291

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall @outmarket/ui

What this malware does

package.json declares a postinstall script that runs automatically on npm install and performs require('https').get(...) to a Burp Collaborator subdomain (7rzjsf29azci2qjsm6kxt23ag1mtanyc.oastify.com), passing os.hostname() and os.userInfo().username as query parameters. Any developer or build system installing this package leaks host identity to an external attacker-controlled OAST endpoint. The package's own description (PENTEST-PoC: Dependency confusion - SecurifyAI engagement 2026-06-23) and the version 9.9.9 published under the @outmarket scope indicate the package is designed to win resolution against an internal private package of the same name and harvest beacons from anyone in the targeted organization who installs it.

Malicious versions

1 flagged

9.9.9

Indicators of compromise (SHA-256)

7241a2e167db383267fa82ce9660a44f7bcca4b6d4f11bb7ca85eaa6b432a47e

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for @outmarket/ui (version 9.9.9).
If you installed it — respond
@outmarket/ui is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If @outmarket/ui was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. @outmarket/ui on npm has been identified as a malicious package (version 9.9.9 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-007207

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks @outmarket/ui-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database