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Node.jsApplication

CVE-2026-48618

MEDIUM · 6.5 CVSS v3.1 Published 2026-06-26
Patch available
A vendor patch is available. No clean upgrade release — apply the published patch.
See remediation →
71/100
Remediation priority · Elevated
Remotely reachable Zero-click Patch available 8 weeks old

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
A flaw in Node.js TLS hostname handling can cause Node.js unicode dot separator handling can lead to tls wildcard-depth authentication bypass due to resolver and verifier hostname normalization mismat. This can lead to confidentiality impact or bypass of the intended security boundary under affected configurations. This vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**.

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

A 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
Node.jsApplication
Affected:= 22.22.3= 24.16.0= 26.3.0

CVSS 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
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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
Patch available Apply the vendor patch
Vendor patch nodejs.org →
Recommended fix Moderate confidence

Node.js 22.23.0+ (for 22.x users), Node.js 24.17.0+ (for 24.x users), Node.js 26.4.0+ (for 26.x users)

  1. 1. Identify the current Node.js version by running: node --version
  2. 2. If running Node.js 22.22.3, upgrade to the latest 22.x stable release (22.23.0 or later)
  3. 3. If running Node.js 24.16.0, upgrade to the latest 24.x stable release (24.17.0 or later)
  4. 4. If running Node.js 26.3.0, upgrade to the latest 26.x stable release (26.4.0 or later)
  5. 5. Use a package manager to upgrade, e.g., nvm install <version> or npm install -g n
  6. 6. Verify the upgrade was successful by running: node --version
  7. 7. Test application functionality to ensure the upgrade does not break existing features
Caveat Minor or patch releases typically have low risk, but review release notes for any breaking changes between your current version and the target version

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 sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-48618 in production — separate from our analysis above.

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What this is

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.

What belongs here
  • 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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