Which versions of gtts-lts are malicious?

The following PyPI versions of gtts-lts are flagged malicious: 2.5.1, 2.5.2, 2.5.3, 2.5.4, 2.5.5, 2.5.6, 2.5.7, 2.5.8. Treat any of these as compromised.

How do I remediate gtts-lts if I installed it?

gtts-lts 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 gtts-lts — how do I know if it already compromised me?

If gtts-lts 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 gtts-lts part of a known attack campaign?

Yes — gtts-lts is associated with the 2025-09-gtts-lts 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 gtts-lts across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for gtts-lts (8 malicious versions).

Malicious package

gtts-ltsPyPI

Advisory published Sep 15, 2025Updated Dec 31, 2025

gtts-lts is a confirmed malicious PyPI package (MAL-2025-191745) that steals credentials and exfiltrates sensitive data (malicious versions 2.5.1, 2.5.2, 2.5.3…). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in gtts-lts (PyPI)

MAL-2025-191745

Immediate action

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

pip uninstall gtts-lts

What this malware does

During the execution, the package silently download and runs a JAR not related to the package job. At the time of analysis, the content was corrupted

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2025-09-gtts-lts

Reasons (based on the campaign):

Downloads and executes a remote executable.
action-hidden-in-lib-usage

Malicious versions

8 flagged

2.5.12.5.22.5.32.5.42.5.52.5.62.5.72.5.8

Indicators of compromise (SHA-256)

9b0e8dd9fd7e7fccd68fdb4c20f8b89e3d563e48aff667fc0e8080c77b38d4dc

7cfb789704a149f7b741d0c68fcb8a32a1e189444ca36f97e435e59d04e073b8

9c5cebf95ec5752e6643b2129bca380d43d5b1845ae0e5313953749ab3c7c782

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for gtts-lts (8 malicious versions).
If you installed it — respond
gtts-lts 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 gtts-lts 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. gtts-lts on PyPI has been identified as a malicious package (versions 2.5.1, 2.5.2, 2.5.3, 2.5.4, 2.5.5, 2.5.6, 2.5.7, 2.5.8 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2025-09-gtts-lts

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193)

Detect & block this

O3 blocks gtts-lts-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