HOMEVULNERABILITIESCVE-2026-5732
HIGH

CVE-2026-5732

CWE-190Published: April 7, 2026· Updated: Apr 13, 2026

8.8
CVSS v3.1

Official Description

Incorrect boundary conditions, integer overflow in the Graphics: Text component. This vulnerability was fixed in Firefox 149.0.2, Firefox ESR 140.9.1, Thunderbird 149.0.2, and Thunderbird 140.9.1.

NVD Source

Technical Analysis

CVE-2026-5732 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.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Vendors & Products

Mozilla1 product
firefox
Source: NVD CPE · 1 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

ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2026-25/
ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2026-27/

All References (5)

→
https://bugzilla.mozilla.org/show_bug.cgi?id=2017867Issue Tracking · Permissions Required
→
https://www.mozilla.org/security/advisories/mfsa2026-25/Vendor Advisory
→
https://www.mozilla.org/security/advisories/mfsa2026-27/Vendor Advisory
→
https://www.mozilla.org/security/advisories/mfsa2026-28/
→
https://www.mozilla.org/security/advisories/mfsa2026-29/

Quick Facts

CVE IDCVE-2026-5732
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-190
CISA KEVNo
Affected1 vendor
PublishedApr 7, 2026

Related CVEs (CWE-190)

CVE-2026-24660
9.8
CVE-2026-30909
9.8
CVE-2026-20884
9.8
CVE-2026-20889
9.8
CVE-2026-14544
9.8
CVE-2026-40962
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-5732 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.
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