CVE-2026-16356
published 2026-07-21CVE-2026-16356: Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR…
PriorityP354critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.39%
32.0th percentile
Sandbox escape due to use-after-free in the Disability Access APIs 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 140.13 | Firefox ESR 140.13 |
| mozilla | firefox_esr | < Firefox ESR 115.38 | Firefox ESR 115.38 |
| mozilla | thunderbird | < Thunderbird 140.13 | Thunderbird 140.13 |
| mozilla | thunderbird | < Thunderbird 153 | Thunderbird 153 |
| 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
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GHSA
Sandbox escape due to use-after-free in the Disability Access APIs component.
ghsa_unreviewed·2026-07-21
CVE-2026-16356 [CRITICAL] CWE-416 Sandbox escape due to use-after-free in the Disability Access APIs component.
Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13.
Red Hat
firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component
vendor_redhat·2026-07-21·CVSS 9.8
CVE-2026-16356 [CRITICAL] firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component
firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Sandbox escape due to use-after-free in the Disability Access APIs 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 E
Mozilla
Mozilla Foundation Security Advisory 2026-72: CVE-2026-16356
vendor_mozilla
CVE-2026-16356 Mozilla Foundation Security Advisory 2026-72: CVE-2026-16356
Mozilla Foundation Security Advisory 2026-72
CVE: CVE-2026-16356
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 140.13
Mozilla
Mozilla Foundation Security Advisory 2026-70: CVE-2026-16356
vendor_mozilla
CVE-2026-16356 Mozilla Foundation Security Advisory 2026-70: CVE-2026-16356
Mozilla Foundation Security Advisory 2026-70
CVE: CVE-2026-16356
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 140.13
Mozilla
Mozilla Foundation Security Advisory 2026-68: CVE-2026-16356
vendor_mozilla
CVE-2026-16356 Mozilla Foundation Security Advisory 2026-68: CVE-2026-16356
Mozilla Foundation Security Advisory 2026-68
CVE: CVE-2026-16356
Product: Firefox
Impact: high
Fixed in: Firefox 153
Mozilla
Mozilla Foundation Security Advisory 2026-69: CVE-2026-16356
vendor_mozilla
CVE-2026-16356 Mozilla Foundation Security Advisory 2026-69: CVE-2026-16356
Mozilla Foundation Security Advisory 2026-69
CVE: CVE-2026-16356
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 115.38
Mozilla
Mozilla Foundation Security Advisory 2026-71: CVE-2026-16356
vendor_mozilla
CVE-2026-16356 Mozilla Foundation Security Advisory 2026-71: CVE-2026-16356
Mozilla Foundation Security Advisory 2026-71
CVE: CVE-2026-16356
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 153
No detection rules found.
No public exploits indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=2052562https://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