CVE-2023-26364
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 version 4.3.0 and earlier are affected by an Improper Input Validation vulnerability that could result in a minor denial of service while attempting to parse CSS. Exploitation of this issue does not require user interaction or privileges.
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 4.3.0 and earlier contain an improper input validation vulnerability in CSS parsing that can be exploited to cause a minor denial of service without requiring user interaction or elevated privileges.
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< 4.3.1CVSS 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
- Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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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Identify if @adobe/css-tools is installedSearch for @adobe/css-tools in package.json dependencies, or run 'npm list @adobe/css-tools' in the project directoryAffected if The package appears in dependencies with any version
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Determine installed versionRun 'npm list @adobe/css-tools --depth=0' or check the version field in node_modules/@adobe/css-tools/package.jsonAffected if Version is 4.3.0 or earlier, or version field is missing/older than 4.3.1
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Check for indirect dependenciesRun 'npm ls @adobe/css-tools' to see if the package is a transitive dependency of another installed packageAffected if The package appears as a child dependency of any installed package
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Verify CSS parsing usageSearch codebase for imports/requires of @adobe/css-tools (e.g., 'require("@adobe/css-tools")' or 'import * as cssTools')Affected if Code actively imports or uses the css-tools library for CSS parsing
You are affected if @adobe/css-tools version 4.3.0 or earlier is installed as a direct or indirect dependency and your code uses it to parse CSS input.
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 · scoped4.3.1
Update @adobe/css-tools to a version newer than 4.3.0 to resolve the improper input validation issue.
@adobe/css-tools version 4.3.1
- Check the current version of @adobe/css-tools in your project by running 'npm list @adobe/css-tools' or viewing package.json
- Update @adobe/css-tools to version 4.3.1 or later using your package manager: 'npm install @adobe/css-tools@^4.3.1' or 'yarn add @adobe/css-tools@^4.3.1' or 'pnpm add @adobe/css-tools@^4.3.1'
- Run your project's dependency installation to ensure the new version is fully integrated
- Verify the updated version is installed by running 'npm list @adobe/css-tools'
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation1.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,376.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-26364 — 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-2023-26364 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
- No spam, self-promotion, credentials, or personal data