MEDIUM
CVE-2026-2804
Published: February 24, 2026· Updated: Feb 25, 2026
5.4
CVSS v3.1
EPSS:0.03%probability of exploitation in 30 daysPercentile:7.9th
Official Description
Use-after-free in the JavaScript: WebAssembly component. This vulnerability affects Firefox < 148 and Thunderbird < 148.
Technical Analysis
CVE-2026-2804 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Affected Vendors & Products
Mozilla2 products
firefoxthunderbird
Source: NVD CPE · 2 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (3)
→
https://bugzilla.mozilla.org/show_bug.cgi?id=2013584Permissions Required
→
https://www.mozilla.org/security/advisories/mfsa2026-13/Vendor Advisory
→
https://www.mozilla.org/security/advisories/mfsa2026-16/Vendor Advisory
Quick Facts
CVE IDCVE-2026-2804
CVSS Score5.4 / 10
SeverityMEDIUM
CISA KEVNo
EPSS (30d)0.03%
Affected1 vendor
PublishedFeb 24, 2026
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-2804 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.