CVE-2026-2779
CRITICAL
2026-02-24
[email protected]
9.8
CVSS 3.1
Share
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Lifecycle Timeline
3
Patch Released
Apr 10, 2026 - 08:30 nvd
Patch available
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
CVE Published
Feb 24, 2026 - 14:16 nvd
CRITICAL 9.8
Description
Incorrect boundary conditions in the Networking: JAR component. This vulnerability affects Firefox < 148, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.
Analysis
Boundary error in Firefox Networking JAR component before 148. Processing JAR (Java Archive) content triggers memory corruption.
Sign in for full analysis, threat intelligence, and remediation guidance.
Remediation
Within 24 hours: Inventory all Firefox and Thunderbird deployments across the organization and assess business-critical usage. Identify high-risk user populations (executives, finance, engineering, system administrators). …
Sign in for detailed remediation steps.
Priority Score
49
Low
Medium
High
Critical
KEV: 0
EPSS: +0.1
CVSS: +49
POC: 0
Vendor Status
Share
External POC / Exploit Code
Leaving vuln.today
Destination URL
POC code from unknown sources may be malicious, contain backdoors, or be fake.
Always review and test exploit code in a safe, isolated environment (VM/sandbox).
Verify the source reputation and cross-reference with known databases (Exploit-DB, GitHub Security).