MalwarePublished 3 Jul 2026Updated 8 Jul 2026

haproxy-config-client (PyPI) · Malicious Code

Affects haproxy-config-clientSource GCVE Database

Malicious package : remove haproxy-config-client and rotate any secrets on hosts that installed it.

Data as of 26 Oct 2026, 15:56 UTC

Classification

Malicious package

Published to PyPI · OSV MAL-2026-6748

What to do

Remove haproxy-config-client from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.

Affected software

Product	Affected	Fixed in
PyPIhaproxy-config-client	Affected =8.5.3	Fixed in–

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Description

--- _-= Per source details. Do not edit below this line.=-_ ## Source: kam193 (f70d07844bca4fadfcedb195f5768c8a95318af4d62a4bcec94556b99b72c4ad) During installation the obfuscated code downloads a malicious executable from a remote location. Code is designed to survive different blocks: first, there is an attempt to download the executable from one of five Cloudflare Workers. If it's not successful, the code falls back to download using DNS: first, it gets a TXT record from c.lin.dl.wel1[.]ru. This record returns a number, which is then used to iterate over domains in the form <0...n>.lin.dl.wel1[.]r and reconstruct the encoded executable from their TXT records. The executable is finally saved under a partially random name, executed, and removed after execution. The Linux executable contacts a few domains, but there is no more detailed information about its behavior available. --- Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers. Campaign: 2026-07-haproxy-config-client Reasons (based on the campaign): - The package overrides the install command in setup.py to execute malicious code during installation. - Downloads and executes a remote executable. - obfuscation - dependency-confusion - other - malware - covering-tracks - targetted-attack - data-stored-in-dns

Impact

Installation of haproxy-config-client version 8.5.3 results in execution of a remote malicious payload on the host system. This can lead to compromise of the affected Linux system, including potential data theft, unauthorized access, or further malware deployment. The malicious code uses obfuscation and multiple fallback mechanisms to evade detection and ensure execution. The exact post-execution impact is not detailed, but the behavior is consistent with malware infection and targeted attacks.

Defensive guidance

Users should avoid installing this specific version of the package. Verify package integrity and source before installation. Monitor for updates from the package maintainer or PyPI security teams for any official fixes or removals. Consider using trusted package sources and supply chain security tools to detect malicious packages.

Summary

The haproxy-config-client PyPI package version 8.5.3 contains obfuscated malicious code embedded in its setup.py that overrides the install command to execute during package installation. This code attempts to download a Linux executable payload from one of five Cloudflare Workers. If unsuccessful, it uses DNS TXT records from a specified domain to reconstruct the executable in parts. The payload is saved under a partially randomized filename, executed, and then removed to cover tracks. The executable contacts multiple domains, though no further behavioral details are provided. This campaign is identified as malicious, involving dependency confusion and targeted attack techniques.

References

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What to do

Affected software

Description

AI analysisMachine-generated, updated 4 Jul 2026, 22:39 UTC

Technical details

References

Community reviews