Mozilla Firefox up to 140.12/152 DOM: Content Processes privileges management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.0$5k-$25k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Mozilla Firefox up to 140.12/152. Affected by this vulnerability is an unknown functionality of the component DOM: Content Processes. The manipulation results in privileges management. This vulnerability is identified as CVE-2026-16379. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Mozilla Firefox up to 140.12/152. It has been classified as critical. Affected is some unknown functionality of the component DOM: Content Processes. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Privilege escalation in the DOM: Content Processes component. This vulnerability was fixed in Firefox 153 and Firefox ESR 140.13.

The advisory is available at bugzilla.mozilla.org. This vulnerability is traded as CVE-2026-16379 since 07/20/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 07/21/2026). This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Upgrading to version 140.13 or 153 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Upgrade: Firefox 140.13/153

Timelineinfo

07/20/2026 CVE reserved
07/21/2026 +1 days Advisory disclosed
07/21/2026 +0 days VulDB entry created
07/21/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: bugzilla.mozilla.org
Status: Confirmed

CVE: CVE-2026-16379 (🔒)
GCVE (CVE): GCVE-0-2026-16379
GCVE (VulDB): GCVE-100-380886

Entryinfo

Created: 07/21/2026 15:46
Changes: 07/21/2026 15:46 (54)
Complete: 🔍
Cache ID: 216::103

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