CVE-2026-74972: Vulnerability in Mozilla Firefox
Information disclosure in the DOM: Push Subscriptions component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
AI Analysis
Technical Summary
CVE-2026-74972 is an information disclosure vulnerability affecting the DOM Push Subscriptions component in Mozilla Firefox. The flaw could allow unauthorized disclosure of information related to push subscriptions. Mozilla fixed this vulnerability in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1 as part of a broader security update addressing multiple high-impact vulnerabilities. The vendor advisory confirms the fix and categorizes the impact as moderate. There are no reports of active exploitation in the wild.
Potential Impact
The vulnerability allows information disclosure in the DOM Push Subscriptions component, which could lead to unauthorized access to sensitive subscription data. The impact is assessed as moderate by Mozilla. There are no known active exploits targeting this vulnerability.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation actions are required beyond applying the official update.
CVE-2026-74972: Vulnerability in Mozilla Firefox
Description
Information disclosure in the DOM: Push Subscriptions component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
CVSS v3.1
Score 4.3medium
Affected software
pkg:github/mozilla/firefox-esrRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-74972 is an information disclosure vulnerability affecting the DOM Push Subscriptions component in Mozilla Firefox. The flaw could allow unauthorized disclosure of information related to push subscriptions. Mozilla fixed this vulnerability in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1 as part of a broader security update addressing multiple high-impact vulnerabilities. The vendor advisory confirms the fix and categorizes the impact as moderate. There are no reports of active exploitation in the wild.
Potential Impact
The vulnerability allows information disclosure in the DOM Push Subscriptions component, which could lead to unauthorized access to sensitive subscription data. The impact is assessed as moderate by Mozilla. There are no known active exploits targeting this vulnerability.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation actions are required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-08-17T11:58:48.433Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-74/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-76/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-77/","vendor":"Mozilla"}]
Threat ID: 6a845509c6e8be0332367452
Added to database: 08/18/2026, 12:50:17 UTC
Last enriched: 08/18/2026, 13:26:09 UTC
Last updated: 08/19/2026, 03:58:08 UTC
Views: 6
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