CVE-2026-4694
published 2026-03-24CVE-2026-4694: Incorrect boundary conditions, integer overflow in the Graphics component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9…
PriorityP339high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.77%
51.6th percentile
Incorrect boundary conditions, integer overflow in the Graphics component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
Affected
13 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 149.0-1 (sid) | firefox 149.0-1 (sid) |
| debian | firefox-esr | < firefox 149.0-1 (sid) | firefox 149.0-1 (sid) |
| debian | thunderbird | < firefox 149.0-1 (sid) | firefox 149.0-1 (sid) |
| mozilla | firefox | < 115.34.0 | 115.34.0 |
| mozilla | firefox | < 149.0 | 149.0 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= 128.0 < 140.9.0 | 140.9.0 |
| mozilla | thunderbird | < 140.9.0 | 140.9.0 |
| mozilla | thunderbird | < 149.0 | 149.0 |
| mozilla | thunderbird | >= 0 < 1:140.9.0esr-1~deb11u1 | 1:140.9.0esr-1~deb11u1 |
| mozilla | thunderbird | >= 0 < 1:140.9.0esr-1~deb12u1 | 1:140.9.0esr-1~deb12u1 |
| mozilla | thunderbird | >= 0 < 1:140.9.0esr-1~deb13u1 | 1:140.9.0esr-1~deb13u1 |
| mozilla | thunderbird | >= 0 < 1:140.9.0esr-1 | 1:140.9.0esr-1 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
osv7.5HIGH
vendor_debian7.5HIGH
vendor_redhat7.5HIGH
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Red Hat
firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component
vendor_redhat·2026-03-24·CVSS 7.5
CVE-2026-4694 [HIGH] CWE-190 firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component
firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component
Incorrect boundary conditions, integer overflow in the Graphics component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Incorrect boundary conditions, integer overflow in the Graphics component
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Affected
Package: rhel10/thunderbird-flatpak (Red Hat Enterprise Linux 10) - Affected
Package: firefox (Red Ha
Debian
CVE-2026-4694: firefox - Incorrect boundary conditions, integer overflow in the Graphics component. This ...
vendor_debian·2026·CVSS 7.5
CVE-2026-4694 [HIGH] CVE-2026-4694: firefox - Incorrect boundary conditions, integer overflow in the Graphics component. This ...
Incorrect boundary conditions, integer overflow in the Graphics component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.
Scope: local
sid: resolved (fixed in 149.0-1)
Mozilla
Mozilla Foundation Security Advisory 2026-24: CVE-2026-4694
vendor_mozilla·CVSS 7.5
CVE-2026-4694 [HIGH] Mozilla Foundation Security Advisory 2026-24: CVE-2026-4694
Mozilla Foundation Security Advisory 2026-24
CVE: CVE-2026-4694
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 140.9
Mozilla
Mozilla Foundation Security Advisory 2026-21: CVE-2026-4694
vendor_mozilla·CVSS 7.5
CVE-2026-4694 [HIGH] Mozilla Foundation Security Advisory 2026-21: CVE-2026-4694
Mozilla Foundation Security Advisory 2026-21
CVE: CVE-2026-4694
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 115.34
Mozilla
Mozilla Foundation Security Advisory 2026-23: CVE-2026-4694
vendor_mozilla·CVSS 7.5
CVE-2026-4694 [HIGH] Mozilla Foundation Security Advisory 2026-23: CVE-2026-4694
Mozilla Foundation Security Advisory 2026-23
CVE: CVE-2026-4694
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 149
Mozilla
Mozilla Foundation Security Advisory 2026-22: CVE-2026-4694
vendor_mozilla·CVSS 7.5
CVE-2026-4694 [HIGH] Mozilla Foundation Security Advisory 2026-22: CVE-2026-4694
Mozilla Foundation Security Advisory 2026-22
CVE: CVE-2026-4694
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 140.9
Mozilla
Mozilla Foundation Security Advisory 2026-20: CVE-2026-4694
vendor_mozilla·CVSS 7.5
CVE-2026-4694 [HIGH] Mozilla Foundation Security Advisory 2026-20: CVE-2026-4694
Mozilla Foundation Security Advisory 2026-20
CVE: CVE-2026-4694
Product: Firefox
Impact: high
Fixed in: Firefox 149
VulDB
Mozilla Firefox up to 148 Graphics integer overflow (Nessus ID 303906 / WID-SEC-2026-0850)
vuldb·2026-04-16·CVSS 7.5
CVE-2026-4694 [HIGH] Mozilla Firefox up to 148 Graphics integer overflow (Nessus ID 303906 / WID-SEC-2026-0850)
A vulnerability described as critical has been identified in Mozilla Firefox up to 148. Impacted is an unknown function of the component Graphics. Such manipulation leads to integer overflow.
This vulnerability is uniquely identified as CVE-2026-4694. The attack can be launched remotely. No exploit exists.
Upgrading the affected component is recommended.
GHSA
GHSA-pm4j-pmqr-8gq4: Incorrect boundary conditions, integer overflow in the Graphics component
ghsa_unreviewed·2026-03-24
CVE-2026-4694 [HIGH] CWE-190 GHSA-pm4j-pmqr-8gq4: Incorrect boundary conditions, integer overflow in the Graphics component
Incorrect boundary conditions, integer overflow in the Graphics component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9.
OSV
CVE-2026-4694: Incorrect boundary conditions, integer overflow in the Graphics component
osv·2026-03-24·CVSS 7.5
CVE-2026-4694 [HIGH] CVE-2026-4694: Incorrect boundary conditions, integer overflow in the Graphics component
Incorrect boundary conditions, integer overflow in the Graphics component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-4694 firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component
bugzilla·2026-03-24·CVSS 7.5
CVE-2026-4694 [HIGH] CVE-2026-4694 firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component
CVE-2026-4694 firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component
Incorrect boundary conditions, integer overflow in the Graphics component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9.
Discussion:
This issue has been addressed in the following products:
Red Hat Enterprise Linux 10
Via RHSA-2026:5931 https://access.redhat.com/errata/RHSA-2026:5931
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 9
Via RHSA-2026:5930 https://access.redhat.com/errata/RHSA-2026:5930
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 8
Via RHSA-2026:5932 https://access.redhat.com/errata/RHSA-2026:5932
---
This issue has been addressed in
Wiz
CVE-2026-4694 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 7.5
CVE-2026-4694 [HIGH] CVE-2026-4694 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-4694 :
NixOS vulnerability analysis and mitigation
Incorrect boundary conditions, integer overflow in the Graphics component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.
Source : NVD
## 7.5
Score
Published March 24, 2026
Severity HIGH
CNA Score 7.5
Affected Technologies
NixOS
Mozilla Firefox
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 5.4
Exploitation Probability (EPSS) N/A
Affected packages and libraries
rhel10::thunderbird-flatpak
cpe:2.3:a:mozilla:firefox
Sources
AlmaLinux 8 Severity HIGH Has Fix Added at: Mar 31, 2026
AlmaLinux 9 Severity HIGH Has Fix Added at: Mar 31, 2026
https://bugzilla.mozilla.org/show_bug.cgi?id=2018430https://www.mozilla.org/security/advisories/mfsa2026-20/https://www.mozilla.org/security/advisories/mfsa2026-21/https://www.mozilla.org/security/advisories/mfsa2026-22/https://www.mozilla.org/security/advisories/mfsa2026-23/https://www.mozilla.org/security/advisories/mfsa2026-24/https://access.redhat.com/errata/RHSA-2026:5930https://access.redhat.com/errata/RHSA-2026:5931https://access.redhat.com/errata/RHSA-2026:5932https://access.redhat.com/errata/RHSA-2026:6188https://access.redhat.com/errata/RHSA-2026:6342https://access.redhat.com/errata/RHSA-2026:6917https://access.redhat.com/errata/RHSA-2026:7837https://access.redhat.com/errata/RHSA-2026:7838https://access.redhat.com/errata/RHSA-2026:7839https://access.redhat.com/errata/RHSA-2026:7840https://access.redhat.com/errata/RHSA-2026:7841https://access.redhat.com/errata/RHSA-2026:7842https://access.redhat.com/errata/RHSA-2026:7843https://access.redhat.com/errata/RHSA-2026:7845https://access.redhat.com/errata/RHSA-2026:7858https://access.redhat.com/errata/RHSA-2026:8284https://access.redhat.com/errata/RHSA-2026:8285https://access.redhat.com/errata/RHSA-2026:8286https://access.redhat.com/errata/RHSA-2026:8287https://access.redhat.com/errata/RHSA-2026:8288https://access.redhat.com/errata/RHSA-2026:8289https://access.redhat.com/errata/RHSA-2026:8290https://access.redhat.com/errata/RHSA-2026:8315https://access.redhat.com/errata/RHSA-2026:8427https://access.redhat.com/errata/RHSA-2026:8850https://access.redhat.com/security/cve/CVE-2026-4694https://bugzilla.redhat.com/show_bug.cgi?id=2450747https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4694.json
2026-03-24
Published