High 8.8Published Apr 7, 2026

CVE-2026-5732Incorrect boundary conditions, integer overflow in the Graphics: Text component

Updated under an hour ago (Oct 26, 2026, 1:30 PM ET)

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It affects Mozilla Firefox and 9 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 8.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-190
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: mozilla
NVD analysis: Modified
Record last updated: Jul 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Mozilla Firefox mozilla:firefox (from the name)	140.9.1 builds before 140.* not affected; from 149.0.2 not affected	CNA record
Mozilla Thunderbird mozilla:thunderbird (from the name)	140.9.1 builds before 140.* not affected; from 149.0.2 not affected	CNA record
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	10	CISA ADP
Red Hat Red Hat Enterprise Linux Server (v. 7 ELS) redhat:rhel_els	7	CISA ADP
Red Hat Red Hat Enterprise Linux AppStream EUS (v. 10.0) redhat:enterprise_linux_eus	10.0	CISA ADP
Red Hat Red Hat Enterprise Linux AppStream AUS (v. 8.2) redhat:rhel_aus	8.2	CISA ADP
Red Hat Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) redhat:rhel_eus_long_life	8.4	CISA ADP
Red Hat Red Hat Enterprise Linux AppStream E4S (v.8.6) redhat:rhel_e4s	8.6	CISA ADP
Red Hat Red Hat Enterprise Linux AppStream TUS (v.8.6) redhat:rhel_tus	8.6	CISA ADP
Red Hat Red Hat Enterprise Linux AppStream EUS (v.9.4) redhat:rhel_eus	9.4	CISA ADP
1–10 of 11

References

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2017867	issue-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/
https://access.redhat.com/errata/RHSA-2026:11805
https://access.redhat.com/errata/RHSA-2026:11813
https://access.redhat.com/errata/RHSA-2026:12264
https://access.redhat.com/errata/RHSA-2026:13342
https://access.redhat.com/errata/RHSA-2026:13412
1–10 of 25

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.