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FirefoxWeb browser · Mozilla

CVE-2024-10466

HIGH · 7.5 CVSS v3.1 Published 2024-10-29
Fix available
A fix is available. Upgrade to 128.4.0 / 132.0 or later.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click

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
By sending a specially crafted push message, a remote server could have hung the parent process, causing the browser to become unresponsive. This vulnerability affects Firefox < 132, Firefox ESR < 128.4, Thunderbird < 128.4, and Thunderbird < 132.

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 · high confidence

A vulnerability in the Web Push notification handling of Firefox and Thunderbird allows a remote server to send a specially crafted push message that hangs the parent process, causing the browser or email client to become unresponsive (Denial of Service).

MitigationUpgrade to Firefox 132, Firefox ESR 128.4, Thunderbird 128.4, or Thunderbird 132 to patch the vulnerable push message handling code.

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
FirefoxWeb browser
Affected:< 128.4.0< 132.0
ThunderbirdApplication
Affected:< 128.4.0>= 129.0, < 132.0

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
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 checks

Work through these to decide whether this CVE applies to you.

  1. Check Firefox version
    Open Firefox, go to Help > About Firefox (or navigate to about:support) to see the installed version number
    Affected if The version is lower than 128.4.0 or between 128.4.0 and 131.x (i.e., any version < 132.0)
  2. Check Thunderbird version
    Open Thunderbird, go to Help > About Thunderbird to see the installed version number
    Affected if The version is lower than 128.4.0, or falls between 129.0 and 131.x (i.e., any version < 132.0 that is not 128.4.x)
  3. Confirm Web Push is enabled
    In Firefox: go to about:config and search for 'push.enabled' or check Settings > Privacy & Security > Permissions > Notifications. In Thunderbird: check Account Settings > Notifications or about:config for 'app.push.enabled'
    Affected if Web Push notifications are enabled (this is the default state; the vulnerability only applies when Push is active)

You are affected if you run Firefox or Thunderbird at any version below 132.0 and have Web Push notifications enabled, since the vulnerability lies in the push message handling code.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 128.4.0 / 132.0 or later
Fixed in 128.4.0132.0
Interim mitigation

Upgrade to Firefox 132, Firefox ESR 128.4, Thunderbird 128.4, or Thunderbird 132 to patch the vulnerable push message handling code.

Recommended fix High confidence

Firefox 132.0+, Firefox ESR 128.4+, Thunderbird 128.4+ or 132.0+

  1. 1. Check the current version of Firefox or Thunderbird by navigating to Menu > Help > About (or typing 'about:support' in the address bar)
  2. 2. For Firefox: Download Firefox 132.0 or later from the official Mozilla website (www.mozilla.org)
  3. 3. For Firefox ESR: Download Firefox ESR 128.4 or later from the official Mozilla website
  4. 4. For Thunderbird: Download Thunderbird 128.4 or later (or 132.0 for the 129.x+ branch) from the official Thunderbird website
  5. 5. Install the updated version, ensuring to close all browser/client windows during installation
  6. 6. Restart the application after installation completes
  7. 7. Verify the version by checking Menu > Help > About to confirm the fix is applied
Caveat Standard upgrade; no major breaking changes expected for this security patch

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Firefox Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA1.0 h
9.0 hours of engineering $1,600
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,560.

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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-2024-10466 in production — separate from our analysis above.

No notes yet

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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
  • No spam, self-promotion, credentials, or personal data