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FirefoxWeb browser · Mozilla

CVE-2024-10459

HIGH · 7.5 CVSS v3.1 Published 2024-10-29
Fix available
A fix is available. Upgrade to 115.17 / 128.4.0 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
An attacker could have caused a use-after-free when accessibility was enabled, leading to a potentially exploitable crash. This vulnerability affects Firefox < 132, Firefox ESR < 128.4, Firefox ESR < 115.17, 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 use-after-free vulnerability in Mozilla Firefox and Thunderbird that triggers when accessibility features are enabled, allowing a remote attacker to potentially exploit memory corruption and cause a crash.

MitigationUpdate affected Firefox and Thunderbird installations to version 132 or later (Firefox ESR to 128.4/115.17 or later) to apply the vendor patch.

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:< 115.17< 132.0>= 116.0, < 128.4.0
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. Identify the installed Mozilla product
    Determine if Firefox or Thunderbird is installed. On Linux, check for /usr/bin/firefox or /usr/bin/thunderbird. On Windows, check Program Files for Mozilla Firefox or Mozilla Thunderbird folders.
    Affected if The product is Mozilla Firefox or Thunderbird
  2. Check the installed Firefox version
    Run 'firefox --version' or open Firefox and navigate to about:support to view the version number.
    Affected if Firefox version is before 115.17, before 132.0, or between 116.0 and 128.4.0 (excluding 128.4.0)
  3. Check the installed Thunderbird version
    Run 'thunderbird --version' or open Thunderbird and navigate to Help > About Thunderbird to view the version number.
    Affected if Thunderbird version is before 128.4.0 or between 129.0 and 132.0 (excluding 132.0)
  4. Verify if accessibility features are enabled
    In Firefox: Go to Settings > Accessibility and check if 'Always use accessibility features' is enabled. In Thunderbird: Go to Settings > Advanced > General and check 'Always enable accessibility features'. Alternatively, check for the accessibility.service.enabled preference in about:config set to true.
    Affected if Accessibility features are turned on or enabled in the application settings

A user is affected if they have Firefox or Thunderbird installed with a version matching the affected ranges AND have accessibility features enabled, since the vulnerability only triggers under that specific configuration.

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 115.17 / 128.4.0 / 132.0 or later
Fixed in 115.17128.4.0132.0
Interim mitigation

Update affected Firefox and Thunderbird installations to version 132 or later (Firefox ESR to 128.4/115.17 or later) to apply the vendor patch.

Recommended fix High confidence

Firefox 132.0 (or Firefox ESR 128.4.0 / Firefox ESR 115.17); Thunderbird 132.0 (or Thunderbird 128.4.0)

  1. Check current Firefox or Thunderbird version via Help > About (or running: firefox --version or thunderbird --version)
  2. For Firefox users on version < 115.17: Upgrade to Firefox 115.17 or later
  3. For Firefox users on versions 116.0 to <128.4.0: Upgrade to Firefox 128.4.0 or later
  4. For Firefox users on versions >=128.4.0 but <132.0: Upgrade to Firefox 132.0 or later
  5. For Thunderbird users on version <128.4.0: Upgrade to Thunderbird 128.4.0 or later
  6. For Thunderbird users on versions 129.0 to <132.0: Upgrade to Thunderbird 132.0 or later
  7. Restart the application after upgrade
  8. Verify the new version is installed by checking Help > About
Caveat Security updates typically have minimal breaking changes; however, some older extensions or system configurations may require review after major version upgrades

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

Fix this in Firefox Scoped from the published advisory
  • Consultation1.0 h
  • Implementation2.0 h
  • Testing1.0 h
  • Review / QA1.0 h
5.0 hours of engineering $890
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,424.

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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-2024-10459 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