CVE-2022-46175: JSON5 is an extension to the popular JSON file format that aims to be easier to write and maintain by hand (e.

Q: How do I fix CVE-2022-46175?

json5: upgrade to 1.0.2, 2.2.2; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2022-46175 being exploited?

CVE-2022-46175 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2022-46175 affect?

CVE-2022-46175 affects json5, fedora. Severity is high (CVSS 7.1). JSON5 is an extension to the popular JSON file format that aims to be easier to write and maintain by hand (e.g. for config files). The `parse` method of the JSON5 library before and including versions 1.0.1 and 2.2.1 does not restrict pars

Q: How urgent is CVE-2022-46175?

Priority 54/100. High severity; EPSS top 5%: very likely to be exploited; Public exploit reference

This week

HIGH 7.1UPGRADEMITIGATE

CVE-2022-46175 is a high-severity flaw (CVSS 7.1) affecting json5, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

JSON5 is an extension to the popular JSON file format that aims to be easier to write and maintain by hand (e.g. for config files). The `parse` method of the JSON5 library before and including versions 1.0.1 and 2.2.1 does not restrict parsing of keys named `__proto__`, allowing specially crafted strings to pollute the prototype of the resulting object. This vulnerability pollutes the prototype of the object returned by `JSON5.parse` and not the

Why this priority

High severity
EPSS top 5%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	9.7% (top 5%)
CISA exploited list	No
Weakness	CWE-1321
Published	2022-12-24
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: fedoraproject · json5

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

Am I affected?

Timeline

2022-12-24 04:15 UTCPublished CVE record published
2026-06-17 05:11 UTCUpdated Record last modified

json5 json5 UPGRADE

Affected: < 1.0.2 · >= 2.0.0 and < 2.2.2

Fixed in: 1.0.2, 2.2.2

Safe to downgrade to: a release before 2.0.0

1. Check installed version

npm ls json5

2. UPGRADE to 1.0.2

npm install json5@">=1.0.2"

3. If no update is available yet, DOWNGRADE to a release before 2.0.0

npm view json5 versions npm install json5@"<2.0.0"

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.

fedoraproject fedora MITIGATE

Affected: 37

Fixed in: no fixed release known

Safe to downgrade to: a release before 37

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2022-46175?

json5: upgrade to 1.0.2, 2.2.2; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-46175 being exploited?

CVE-2022-46175 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-2022-46175 affect?

CVE-2022-46175 affects json5, fedora. Severity is high (CVSS 7.1). JSON5 is an extension to the popular JSON file format that aims to be easier to write and maintain by hand (e.g. for config files). The `parse` method of the JSON5 library before and including versions 1.0.1 and 2.2.1 does not restrict pars

How urgent is CVE-2022-46175?

Priority 54/100. High severity; EPSS top 5%: very likely to be exploited; Public exploit reference

References

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