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Malicious package

a11y-tabindex-managernpm

Advisory published Updated

a11y-tabindex-manager is a confirmed malicious npm package (MAL-2026-17501) that steals credentials and exfiltrates sensitive data (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in a11y-tabindex-manager (npm)

MAL-2026-17501
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall a11y-tabindex-manager

What this malware does

a11y-tabindex-manager ships thunderboltRegistry.js, which executes an IIFE on module load that runs a series of local shell commands (cat /etc/hosts, whoami, id, pwd, ifconfig/ip addr, hostname, cat /etc/resolv.conf, uname -a, env | head -50) via child_process.execSync and POSTs each output over plain HTTP to the hardcoded endpoint http://dxpoc.gt.tc/callback.php/ef9ea0e191006f3cc6670720c99c26f3. A separate beacon labeled 'rce-poc-v3' sends Node.js version, platform, and PID to the same host. child_process is acquired both directly and via a fallback that instantiates a new Module (new module.constructor()) and copies module.paths — an evasion technique to bypass simple require('child_process') scans. The package name resembles a generic accessibility helper, but the shipped registry entry performs host identity, network configuration, user, and environment-variable harvesting with no legitimate purpose.

Malicious versions

1 flagged
1.0.0

Indicators of compromise (SHA-256)

ce127c3e1cadd4f544a5f2580f2db030e3d9e3667d7b0e3399d85b59eb354045

Detection & response playbook

Credential / info stealer
  1. Find it

    Search your lockfiles and build artifacts for a11y-tabindex-manager (version 1.0.0).

  2. If you installed it — respond

    a11y-tabindex-manager 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.

  3. Did it already run?

    If a11y-tabindex-manager 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. a11y-tabindex-manager on npm has been identified as a malicious package (version 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-020976

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks a11y-tabindex-manager-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Explore

a11y-tabindex-manager (npm) malicious package — MAL-2026-17501 | O3 Security