FedoraOperating system · Fedoraproject
CVE-2022-46175
A fix is available.
Upgrade to 1.0.2 / 2.2.2 or later.
See remediation →
94/100
Remediation priority · Urgent
Public exploit
Remotely reachable
Zero-click
Patch available
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedJSON5 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 global Object prototype, which is the commonly understood definition of Prototype Pollution. However, polluting the prototype of a single object can have significant security impact for an application if the object is later used in trusted operations. This vulnerability could allow an attacker to set arbitrary and unexpected keys on the object returned from `JSON5.parse`. The actual impact will depend on how applications utilize the returned object and how they filter unwanted keys, but could include denial of service, cross-site scripting, elevation of privilege, and in extreme cases, remote code execution. `JSON5.parse` should restrict parsing of `__proto__` keys when parsing JSON strings to objects. As a point of reference, the `JSON.parse` method included in JavaScript ignores `__proto__` keys. Simply changing `JSON5.parse` to `JSON.parse` in the examples above mitigates this vulnerability. This vulnerability is patched in json5 versions 1.0.2, 2.2.2, and later.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysisA detailed technical summary for this CVE is being prepared.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
FedoraOperating system
Affected:
= 37
Json5Application
Affected:
< 1.0.2>= 2.0.0, < 2.2.2CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped
Upgrade available
Upgrade to 1.0.2 / 2.2.2 or later
Fixed in
1.0.22.2.2
Vendor patch
github.com →
Recommended fix
High confidence
json5 version 1.0.2 or later, OR version 2.2.2 or later
- Identify the current version of json5 in use by checking package.json or package-lock.json
- Run 'npm list json5' or 'yarn list json5' to confirm the installed version
- If using json5 version 1.x and below 1.0.2: upgrade to version 1.0.2 or later by running 'npm install json5@^1.0.2' or 'yarn add json5@^1.0.2'
- If using json5 version 2.x and below 2.2.2: upgrade to version 2.2.2 or later by running 'npm install json5@^2.2.2' or 'yarn add json5@^2.2.2'
- Verify the upgrade was successful by running 'npm list json5' or 'yarn list json5'
- Test the application to ensure JSON5 parsing still works correctly with the new version
Caveat Review the json5 changelog (https://github.com/json5/json5/blob/main/CHANGELOG.md) for any breaking changes between your current version and the target version before upgrading
Generated from the published advisory — verify against the referenced sources before acting.
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2022-46175 in production — separate from our analysis above.
Know something about CVE-2022-46175?
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
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What belongs here
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