CVE-2023-48631
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 · unedited@adobe/css-tools versions 4.3.1 and earlier are affected by an Improper Input Validation vulnerability that could result in a denial of service while attempting to parse CSS.
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 analysis · moderate confidence@adobe/css-tools versions 4.3.1 and earlier contain an improper input validation vulnerability in CSS parsing that can be exploited to cause denial of service. Crafted CSS input can trigger excessive resource consumption or parsing errors leading to service unavailability.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
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< 4.3.2CVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Locate @adobe/css-tools installationSearch for @adobe/css-tools in your project dependencies by checking package.json, package-lock.json, yarn.lock, or running 'npm list @adobe/css-tools' or 'yarn list @adobe/css-tools'Affected if The package is listed as a dependency
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Identify installed versionRun 'npm list @adobe/css-tools --depth=0' or 'yarn list @adobe/css-tools --depth=0' to see the exact installed version numberAffected if The version shown is 4.3.1 or any version earlier than 4.3.2
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Verify CSS parsing usageSearch your codebase for imports of @adobe/css-tools and usage of its parsing functions such as parse, parseAttrs, or stringifyAffected if The library is imported and used to parse CSS input in your application
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Assess input trust contextReview whether the CSS input being parsed comes from untrusted sources such as user uploads, external APIs, or database fields that could contain crafted payloadsAffected if Untrusted CSS input is processed by the vulnerable library version
Your environment is affected if @adobe/css-tools version 4.3.1 or earlier is installed and is used to parse CSS input, particularly from untrusted sources.
Generated from the published advisory. Verify against your own configuration.
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 · scoped4.3.2
Update @adobe/css-tools to a version newer than 4.3.1. Review CSS input handling and implement input sanitization or resource limits if the library is used to parse untrusted CSS.
Upgrade @adobe/css-tools to version 4.3.2 or later
- Update the @adobe/css-tools dependency in your project to version 4.3.2 or later
- Run your package manager's update command (e.g., npm install @adobe/css-tools@latest, yarn upgrade @adobe/css-tools, or pnpm update @adobe/css-tools)
- Verify the updated version is installed correctly by checking your lockfile or running a version check command
- Rebuild or restart any services that use this package to ensure the patched version is loaded
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation2.0 h
- Testing6.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-48631 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
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-2023-48631 in production — separate from our analysis above.
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
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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