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A single post-release of dydx-v4-client contained obfuscated multi-stage loader

What to do

Vendor response not established. Follow the primary source's mitigation guidance and check back for a fix.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • PyPI dydx-v4-client

    Affected
    >= 1.1.5.post1, <= 1.1.5.post1
    Fixed in
    no fixed version recorded

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
not scored
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

A PyPI user account compromised by an attacker and was able to upload a malicious version (1.1.5.post1) of the `dydx-v4-client` package. This version contains a highly obfuscated multi-stage loader that ultimately executes malicious code on the host system. While the final payload is not visible because it is tucked away inside 100 layers of encoding, the structural design—specifically the use of recursive decompression followed by an `exec()` call is a definitive indicator of malicious software, likely a "Crypter" or "Dropper" masquerading as a cryptocurrency-related utility. with the intent on connecting to hxxps://dydx.priceoracle.site/py to download and execute further payloads. Users of the `dydx-v4-client` package should immediately uninstall version 1.1.5.post1 and revert to the last known good version (1.1.5) or later secure versions once available. Additionally, users should monitor their systems for any unusual activity and consider running security scans to detect any…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from osv record PYSEC-2026-1

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: pysec-2026-1

Advisory: A single post-release of dydx-v4-client contained obfuscated multi-stage loader
IDs: pysec-2026-1
Record: https://patchnext.com/advisories/pysec-2026-1 (revision 1, source checked 24 Oct 2026, 04:13 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Unrated
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI dydx-v4-client: affected >= 1.1.5.post1, <= 1.1.5.post1

## Suggested inspection (read-only)
- `python -m pip show dydx-v4-client`: prints the installed version. Run with the environment that serves production active.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on dydx-v4-client.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/PYSEC-2026-1 (OSV record PYSEC-2026-1 lists affected ranges: PyPI dydx-v4-client >=1.1.5.post1 <=1.1.5.post1)

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