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Unratedamended

Telnyx has malicious code in PyPI versions 4.87.1 and 4.87.2

GHSA-955r-262c-33jc

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 telnyx

    Affected
    >= 4.87.1, <= 4.87.2
    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.

Summary On March 27, 2026, a threat actor used compromised PyPI credentials to publish malicious versions 4.87.1 and 4.87.2 of the telnyx Python package directly to PyPI. These versions contain credential-stealing malware and were not published through the legitimate GitHub release pipeline. Exposure Window | Version | Published (UTC) | Quarantined (UTC) | Exposure | |---------|-----------------|-------------------|----------| | 4.87.1 (broken) | 2026-03-27 03:51 | 2026-03-27 10:13 | 6h 22m | | 4.87.2 (functional) | 2026-03-27 04:07 | 2026-03-27 10:13 | 6h 6m | Both versions were quarantined by PyPI at 2026-03-27 10:13 UTC. Note: Version 4.87.1 contained a typo that prevented the malware from executing. Only 4.87.2 was fully functional. Who Is Affected You may be affected if: - You installed or upgraded the telnyx Python package between 03:51 UTC and 10:13 UTC on March 27, 2026 - You ran pip install telnyx without pinning a version and received 4.87.1 or 4.87.2 - A dependency in your…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 3 · amended ·

    Amended from ghsa record GHSA-955r-262c-33jc

  2. Revision 2 · amended ·

    Amended from osv record GHSA-955r-262c-33jc

  3. Revision 1 · created ·

    Published from ghsa record GHSA-955r-262c-33jc

Agent brief

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

# Patch Next advisory brief: GHSA-955r-262c-33jc

Advisory: Telnyx has malicious code in PyPI versions 4.87.1 and 4.87.2
IDs: GHSA-955r-262c-33jc
Record: https://patchnext.com/advisories/ghsa-955r-262c-33jc (revision 3, source checked 26 Oct 2026, 13:40 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 telnyx: affected >= 4.87.1, <= 4.87.2

## Suggested inspection (read-only)
- `python -m pip show telnyx`: 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 telnyx.
- 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://github.com/advisories/GHSA-955r-262c-33jc (GitHub-reviewed advisory GHSA-955r-262c-33jc lists affected ranges: PyPI telnyx >=4.87.1 <=4.87.2)
- Verified: https://osv.dev/vulnerability/GHSA-955r-262c-33jc (OSV record GHSA-955r-262c-33jc lists affected ranges: PyPI telnyx >=4.87.1 <=4.87.2)

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