CVE-2024-3852Public exploitNetwork attack vector

Global-object exposure via misoptimized GetBoundName lookup

Published Apr 16, 2024 · Updated Aug 1, 2024

Object-binding error in Firefox and Thunderbird allows remote attackers to expose a bare global object through crafted JavaScript. The GetBoundName inline cache treats the global object as an ordinary native object after BindName returns it, attaches a normal getter, and passes the bare global rather than the WindowProxy expected at the security boundary. Exploitation requires user interaction with script content and JIT optimization; Thunderbird disables scripting while reading email, limiting exposure to browser-like contexts.

CVSS severity7.5
High
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Object-binding error in Firefox and Thunderbird allows remote attackers to expose a bare global object through crafted JavaScript. The GetBoundName inline cache treats the global object as an ordinary native object after BindName returns it, attaches a normal getter, and passes the bare global rather than the WindowProxy expected at the security boundary. Exploitation requires user interaction with script content and JIT optimization; Thunderbird disables scripting while reading email, limiting exposure to browser-like contexts.

The record

CVE
CVE-2024-3852
Published
Apr 16, 2024
Updated
Aug 1, 2024
Vendor
Mozilla
Product
Firefox
Classifications
CWE-386
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 16, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <125
  2. Affected versionversion=unspecified <125

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mozilla · Firefoxversion=0 <125; version=unspecified <125
Mozilla · Thunderbirdversion=0 <115.10; version=unspecified <115.10
Mozilla · Firefox ESRversion=0 <115.10; version=unspecified <115.10

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-386Symbolic Name not Mapping to Correct Object

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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