CVE-2026-16353: Vulnerability in Mozilla Firefox
CVE-2026-16353 is a critical vulnerability in Mozilla Firefox involving an invalid pointer in the DOM: Bindings (WebIDL) component. This flaw could lead to severe impacts including potential arbitrary code execution due to memory corruption. The vulnerability was fixed in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13. No known exploits in the wild have been reported. The CVSS score is 9.8, indicating a critical severity level.
AI Analysis
Technical Summary
CVE-2026-16353 is a critical memory safety vulnerability in Mozilla Firefox's DOM: Bindings (WebIDL) component caused by an invalid pointer. This vulnerability can lead to high impact outcomes such as confidentiality, integrity, and availability compromises. It was addressed and fixed in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13. The vendor advisories confirm the fix and note the high impact severity. There are no reports of active exploitation in the wild. The vulnerability is part of a broader set of memory safety bugs fixed in these versions.
Potential Impact
The vulnerability allows an attacker to potentially exploit invalid pointer dereferencing in the DOM Bindings component, which can lead to arbitrary code execution, memory corruption, or crashes. The CVSS 3.1 base score of 9.8 reflects critical impact on confidentiality, integrity, and availability with no required privileges or user interaction and network attack vector. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
This vulnerability is fixed in Mozilla Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13. Users and administrators should upgrade to these versions or later to remediate the issue. There is no indication from the vendor advisories that additional mitigations or workarounds are required beyond applying the official fixes.
CVE-2026-16353: Vulnerability in Mozilla Firefox
Description
CVE-2026-16353 is a critical vulnerability in Mozilla Firefox involving an invalid pointer in the DOM: Bindings (WebIDL) component. This flaw could lead to severe impacts including potential arbitrary code execution due to memory corruption. The vulnerability was fixed in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13. No known exploits in the wild have been reported. The CVSS score is 9.8, indicating a critical severity level.
CVSS v3.1
Score 9.8critical
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16353 is a critical memory safety vulnerability in Mozilla Firefox's DOM: Bindings (WebIDL) component caused by an invalid pointer. This vulnerability can lead to high impact outcomes such as confidentiality, integrity, and availability compromises. It was addressed and fixed in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13. The vendor advisories confirm the fix and note the high impact severity. There are no reports of active exploitation in the wild. The vulnerability is part of a broader set of memory safety bugs fixed in these versions.
Potential Impact
The vulnerability allows an attacker to potentially exploit invalid pointer dereferencing in the DOM Bindings component, which can lead to arbitrary code execution, memory corruption, or crashes. The CVSS 3.1 base score of 9.8 reflects critical impact on confidentiality, integrity, and availability with no required privileges or user interaction and network attack vector. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
This vulnerability is fixed in Mozilla Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13. Users and administrators should upgrade to these versions or later to remediate the issue. There is no indication from the vendor advisories that additional mitigations or workarounds are required beyond applying the official fixes.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-07-20T21:55:55.027Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-68/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-69/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-70/","vendor":"Mozilla"}]
Threat ID: 6a5f6cb92a4a8d598926241a
Added to database: 07/21/2026, 12:57:29 UTC
Last enriched: 07/30/2026, 11:22:36 UTC
Last updated: 08/28/2026, 10:52:06 UTC
Views: 49
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.