CVE-2022-46179: LiuOS is a small Python project meant to imitate the functions of a regular operating system

This month

CRITICAL 9.2DOWNGRADE

CVE-2022-46179 is a critical-severity flaw (CVSS 9.2) affecting liuos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

LiuOS is a small Python project meant to imitate the functions of a regular operating system. Version 0.1.0 and prior of LiuOS allow an attacker to set the GITHUB_ACTIONS environment variable to anything other than null or true and skip authentication checks. This issue is patched in the latest commit (c658b4f3e57258acf5f6207a90c2f2169698ae22) by requiring the var to be set to true, causing a test script to run instead of being able to login. A p

Why this priority

Critical severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.2 (Critical)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 72%)
CISA exploited list	No
Weakness	CWE-639
Published	2022-12-28
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: liuos project

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

Am I affected?

Timeline

2022-12-28 08:15 UTCPublished CVE record published
2026-06-17 05:11 UTCUpdated Record last modified

liuos project liuos DOWNGRADE

Affected: 0.1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.1.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.1.0 (Debian / Ubuntu)

apt-cache madison liuos sudo apt install liuos=<VERSION_BEFORE_0.1.0> sudo apt-mark hold liuos

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list liuos sudo dnf downgrade liuos-<VERSION_BEFORE_0.1.0> sudo dnf versionlock add liuos

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-2022-46179?

liuos: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-46179 being exploited?

CVE-2022-46179 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-2022-46179 affect?

CVE-2022-46179 affects liuos. Severity is critical (CVSS 9.2). LiuOS is a small Python project meant to imitate the functions of a regular operating system. Version 0.1.0 and prior of LiuOS allow an attacker to set the GITHUB_ACTIONS environment variable to anything other than null or true and skip aut

How urgent is CVE-2022-46179?

Priority 44/100. Critical severity; Public exploit reference

Software pages

Python vulnerabilities · GitHub vulnerabilities

References

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