CVE-2022-28470: marcador package in PyPI 0.1 through 0.13 included a code-execution backdoor.

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2022-28470 is a critical-severity flaw (CVSS 9.8) affecting pypi. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

marcador package in PyPI 0.1 through 0.13 included a code-execution backdoor.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.3% (top 17%)
CISA exploited list	No
Published	2022-05-08
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: python

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-05-08 20:15 UTCPublished CVE record published
2026-06-17 04:38 UTCUpdated Record last modified

python pypi UPGRADE

Affected: >= 0.1 and <= 0.13

Fixed in: newer than 0.13

Safe to downgrade to: a release before 0.1

1. Check installed version

apt-cache policy pypi || rpm -q pypi || pypi --version

2. UPGRADE to newer than 0.13 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pypi

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pypi

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 0.1 (Debian / Ubuntu)

apt-cache madison pypi sudo apt install pypi=<VERSION_BEFORE_0.1> sudo apt-mark hold pypi

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list pypi sudo dnf downgrade pypi-<VERSION_BEFORE_0.1> sudo dnf versionlock add pypi

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-28470?

pypi: upgrade to newer than 0.13. Exact commands for each OS are on this page.

Is CVE-2022-28470 being exploited?

CVE-2022-28470 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-28470 affect?

CVE-2022-28470 affects pypi. Severity is critical (CVSS 9.8). marcador package in PyPI 0.1 through 0.13 included a code-execution backdoor.

How urgent is CVE-2022-28470?

Priority 65/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities · PyPI packages vulnerabilities

Related CVEs

CVE-2022-34501 CRITICAL 9.8 UPGRADE The bin-collection package in PyPI before v0.1 included a code execution backdoor inserted by a third party.
CVE-2022-34500 CRITICAL 9.8 UPGRADE The bin-collect package in PyPI before v0.1 included a code execution backdoor inserted by a third party.

References

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