Which versions of @cashback/postal-premium are malicious?

The following npm versions of @cashback/postal-premium are flagged malicious: 99.9.9. Treat any of these as compromised.

How do I remediate @cashback/postal-premium if I installed it?

Remove @cashback/postal-premium from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

I already installed @cashback/postal-premium — how do I know if it already compromised me?

If @cashback/postal-premium 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 @cashback/postal-premium part of a known attack campaign?

Yes — @cashback/postal-premium is associated with the RLMA-2026-04698, RLUA-2026-05839 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 @cashback/postal-premium across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for @cashback/postal-premium (version 99.9.9).

Malicious package

@cashback/postal-premiumnpm

Advisory published Jul 7, 2026Updated Sep 1, 2026

@cashback/postal-premium is a confirmed malicious npm package (MAL-2026-7060) that executes malicious code on install (malicious version 99.9.9). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in @cashback/postal-premium (npm)

MAL-2026-7060

Immediate action

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

npm uninstall @cashback/postal-premium

Malicious versions

1 flagged

99.9.9

Indicators of compromise (SHA-256)

49c04498ad37a4d501c47b3c2265323dcfeff452d6e82c81292e5c4b30b0c355

019534fa1f5b61203462dc5694d4cfc73c78423e47f7763c13b34e23e4ab1d8d

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for @cashback/postal-premium (version 99.9.9).
If you installed it — respond
Remove @cashback/postal-premium from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If @cashback/postal-premium 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. @cashback/postal-premium on npm has been identified as a malicious package (version 99.9.9 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-04698RLUA-2026-05839

References

github.com

Credits

ReversingLabs · finder

Detect & block this

O3 blocks @cashback/postal-premium-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Malware detection Runtime egress monitoring

Explore

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