Description
Incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
Published: 2026-03-24
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: Memory corruption potentially leading to code execution
Action: Apply patch
AI Analysis

Impact

An incorrect boundary condition in the Graphics component can trigger memory corruption when processing graphic data. This flaw allows an attacker to overwrite adjacent memory areas, which may lead to application crashes or, depending on the attack vector, the execution of arbitrary code. The vulnerability is categorized as CWE‑754 and CWE‑787, indicating buffer misuse that can corrupt heap or stack memory.

Affected Systems

Mozilla Firefox versions earlier than 149 and ESR 140.9, and Mozilla Thunderbird versions earlier than 149 and ESR 140.9 are affected by this flaw.

Risk and Exploitability

The CVSS score of 7.5 denotes a high severity. The EPSS score is below 1%, and the vulnerability is not listed in CISA’s KEV catalog. The likely attack vector involves an attacker delivering a specially crafted graphic or attachment that forces the client to process the invalid boundary. This inference is based on the nature of the flaw and the affected product’s rendering responsibilities.

Generated by OpenCVE AI on April 13, 2026 at 16:17 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Update Firefox to version 149 or newer, including ESR 140.9 and later releases.
  • Update Thunderbird to version 149 or newer, including ESR 140.9 and later releases.
  • Verify that the update has been applied by checking the About menu for the current version.
  • If an update cannot be applied, consider disabling the graphics component’s hardware acceleration or limiting graphic processing through available configuration settings.

Generated by OpenCVE AI on April 13, 2026 at 16:17 UTC.

Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4510-1 firefox-esr security update
Debian DLA Debian DLA DLA-4511-1 thunderbird security update
Debian DSA Debian DSA DSA-6178-1 firefox-esr security update
Debian DSA Debian DSA DSA-6179-1 thunderbird security update
History

Mon, 13 Apr 2026 14:30:00 +0000

Type Values Removed Values Added
Description Incorrect boundary conditions in the Graphics component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9. Incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

Thu, 26 Mar 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-787
References
Metrics threat_severity

None

 threat_severity

Moderate

Wed, 25 Mar 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 25 Mar 2026 12:00:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla firefox Esr
Vendors & Products Mozilla firefox Esr

Tue, 24 Mar 2026 20:30:00 +0000

Type Values Removed Values Added
Description Incorrect boundary conditions in the Graphics component. This vulnerability affects Firefox < 149 and Firefox ESR < 140.9. Incorrect boundary conditions in the Graphics component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.
First Time appeared Mozilla
Mozilla firefox
Weaknesses CWE-754
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
Vendors & Products Mozilla
Mozilla firefox
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Tue, 24 Mar 2026 12:45:00 +0000

Type Values Removed Values Added
Description Incorrect boundary conditions in the Graphics component. This vulnerability affects Firefox < 149 and Firefox ESR < 140.9.
Title Incorrect boundary conditions in the Graphics component
References

Subscriptions

Mozilla Firefox Firefox Esr
cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-04-13T13:50:42.608Z

Reserved: 2026-03-23T23:22:17.660Z

Link: CVE-2026-4708

cve-icon Vulnrichment

Updated: 2026-03-25T16:28:44.691Z

cve-icon NVD

Status : Modified

Published: 2026-03-24T13:16:06.707

Modified: 2026-04-13T15:17:41.807

Link: CVE-2026-4708

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-03-24T12:30:34Z

Links: CVE-2026-4708 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-04-14T16:43:02Z

Weaknesses