CVE-2026-5732: Vulnerability in Mozilla Firefox
CVE-2026-5732 is a high-impact vulnerability in Mozilla Firefox affecting versions prior to 149. 0. 2 and Firefox ESR prior to 140. 9. 1. It involves incorrect boundary conditions and an integer overflow in the Graphics: Text component. This vulnerability is part of a set of memory safety bugs that showed evidence of memory corruption and could potentially be exploited to execute arbitrary code. Mozilla has released official fixes for this vulnerability in Firefox 149. 0. 2 and Firefox ESR 140.
AI Analysis
Technical Summary
CVE-2026-5732 is a memory safety vulnerability caused by incorrect boundary conditions and an integer overflow in the Graphics: Text component of Mozilla Firefox. It affects Firefox versions earlier than 149.0.2 and Firefox ESR versions earlier than 140.9.1. The vulnerability was reported by Sajeeb Lohani and is classified as high impact due to the potential for memory corruption that could lead to arbitrary code execution. Mozilla addressed this issue in security advisories MFSA 2026-25 and MFSA 2026-27 by releasing patches in Firefox 149.0.2 and Firefox ESR 140.9.1.
Potential Impact
The vulnerability allows for memory corruption through incorrect boundary checks and integer overflow in the graphics text rendering component. This memory corruption could be leveraged by an attacker to execute arbitrary code on the affected system. The impact is classified as high by Mozilla. There are no known exploits in the wild at the time of publication.
Mitigation Recommendations
Mozilla has released official patches that fix this vulnerability in Firefox 149.0.2 and Firefox ESR 140.9.1. Users and administrators should update affected Firefox installations to these versions or later to remediate the vulnerability. No additional mitigation steps are required beyond applying the official updates.
CVE-2026-5732: Vulnerability in Mozilla Firefox
Description
CVE-2026-5732 is a high-impact vulnerability in Mozilla Firefox affecting versions prior to 149. 0. 2 and Firefox ESR prior to 140. 9. 1. It involves incorrect boundary conditions and an integer overflow in the Graphics: Text component. This vulnerability is part of a set of memory safety bugs that showed evidence of memory corruption and could potentially be exploited to execute arbitrary code. Mozilla has released official fixes for this vulnerability in Firefox 149. 0. 2 and Firefox ESR 140.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-5732 is a memory safety vulnerability caused by incorrect boundary conditions and an integer overflow in the Graphics: Text component of Mozilla Firefox. It affects Firefox versions earlier than 149.0.2 and Firefox ESR versions earlier than 140.9.1. The vulnerability was reported by Sajeeb Lohani and is classified as high impact due to the potential for memory corruption that could lead to arbitrary code execution. Mozilla addressed this issue in security advisories MFSA 2026-25 and MFSA 2026-27 by releasing patches in Firefox 149.0.2 and Firefox ESR 140.9.1.
Potential Impact
The vulnerability allows for memory corruption through incorrect boundary checks and integer overflow in the graphics text rendering component. This memory corruption could be leveraged by an attacker to execute arbitrary code on the affected system. The impact is classified as high by Mozilla. There are no known exploits in the wild at the time of publication.
Mitigation Recommendations
Mozilla has released official patches that fix this vulnerability in Firefox 149.0.2 and Firefox ESR 140.9.1. Users and administrators should update affected Firefox installations to these versions or later to remediate the vulnerability. No additional mitigation steps are required beyond applying the official updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-04-07T12:43:12.349Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-25/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-27/","vendor":"Mozilla"}]
Threat ID: 69d50016aaed68159a219cd9
Added to database: 4/7/2026, 1:01:10 PM
Last enriched: 4/7/2026, 1:16:50 PM
Last updated: 4/7/2026, 2:17:22 PM
Views: 3
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.