CVE-2026-16357
published 2026-07-21CVE-2026-16357: Incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153…
PriorityP353critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.40%
33.1th percentile
Incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.
Affected
14 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 153 | Firefox 153 |
| mozilla | firefox | < 115.38.0 | 115.38.0 |
| mozilla | firefox | < 153.0.0 | 153.0.0 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= 128.1.0 < 140.13.0 | 140.13.0 |
| mozilla | firefox_esr | < Firefox ESR 115.38 | Firefox ESR 115.38 |
| mozilla | firefox_esr | < Firefox ESR 140.13 | Firefox ESR 140.13 |
| mozilla | thunderbird | < Thunderbird 153 | Thunderbird 153 |
| mozilla | thunderbird | < Thunderbird 140.13 | Thunderbird 140.13 |
| mozilla | thunderbird | < 140.13.0 | 140.13.0 |
| mozilla | thunderbird | — | — |
| mozilla | thunderbird | >= 141.0 < 153.0 | 153.0 |
| rhel10 | firefox-flatpak | — | — |
| rhel10 | thunderbird-flatpak | — | — |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vendor_redhat9.8CRITICAL
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Red Hat
firefox: thunderbird: Incorrect boundary conditions in the Graphics component
vendor_redhat·2026-07-21·CVSS 9.8
CVE-2026-16357 [CRITICAL] CWE-787 firefox: thunderbird: Incorrect boundary conditions in the Graphics component
firefox: thunderbird: Incorrect boundary conditions in the Graphics component
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Incorrect boundary conditions in the Graphics component
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Package: firefox (Red Hat Enterprise Linux 10) - Affected
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Affected
Package: rhel10/thunderbird-flatpak (Red Hat Enterprise Linux 10) - Affected
Package: thunderbird (Red Hat Enterprise Linux 10) - Affected
Package: firefox (Red Hat Enterprise Linux 6) - Out of support scope
Package: thunderbird (Red Hat Enterprise Linux 6) - Out of support scope
Mozilla
Mozilla Foundation Security Advisory 2026-71: CVE-2026-16357
vendor_mozilla
CVE-2026-16357 Mozilla Foundation Security Advisory 2026-71: CVE-2026-16357
Mozilla Foundation Security Advisory 2026-71
CVE: CVE-2026-16357
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 153
Mozilla
Mozilla Foundation Security Advisory 2026-72: CVE-2026-16357
vendor_mozilla
CVE-2026-16357 Mozilla Foundation Security Advisory 2026-72: CVE-2026-16357
Mozilla Foundation Security Advisory 2026-72
CVE: CVE-2026-16357
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 140.13
Mozilla
Mozilla Foundation Security Advisory 2026-69: CVE-2026-16357
vendor_mozilla
CVE-2026-16357 Mozilla Foundation Security Advisory 2026-69: CVE-2026-16357
Mozilla Foundation Security Advisory 2026-69
CVE: CVE-2026-16357
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 115.38
Mozilla
Mozilla Foundation Security Advisory 2026-68: CVE-2026-16357
vendor_mozilla
CVE-2026-16357 Mozilla Foundation Security Advisory 2026-68: CVE-2026-16357
Mozilla Foundation Security Advisory 2026-68
CVE: CVE-2026-16357
Product: Firefox
Impact: high
Fixed in: Firefox 153
Mozilla
Mozilla Foundation Security Advisory 2026-70: CVE-2026-16357
vendor_mozilla
CVE-2026-16357 Mozilla Foundation Security Advisory 2026-70: CVE-2026-16357
Mozilla Foundation Security Advisory 2026-70
CVE: CVE-2026-16357
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 140.13
GHSA
Incorrect boundary conditions in the Graphics component.
ghsa_unreviewed·2026-07-21
CVE-2026-16357 [CRITICAL] CWE-119 Incorrect boundary conditions in the Graphics component.
Incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13.
No detection rules found.
No public exploits indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=2053326https://www.mozilla.org/security/advisories/mfsa2026-68/https://www.mozilla.org/security/advisories/mfsa2026-69/https://www.mozilla.org/security/advisories/mfsa2026-70/https://www.mozilla.org/security/advisories/mfsa2026-71/https://www.mozilla.org/security/advisories/mfsa2026-72/
2026-07-21
Published