CVE-2026-12313
published 2026-06-16CVE-2026-12313: Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12…
PriorityP421medium4.7CVSS 3.1
AVNACLPRNUIRSCCLINAN
EPSS
0.18%
7.2th percentile
Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.
Affected
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 152 | Firefox 152 |
| mozilla | firefox | < 152.0 | 152.0 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= 140.0 < 140.12.0 | 140.12.0 |
| mozilla | firefox_esr | < Firefox ESR 140.12 | Firefox ESR 140.12 |
| mozilla | thunderbird | < Thunderbird 140.12 | Thunderbird 140.12 |
| mozilla | thunderbird | < Thunderbird 152 | Thunderbird 152 |
| mozilla | thunderbird | < 152.0.0 | 152.0.0 |
| mozilla | thunderbird | — | — |
| mozilla | thunderbird | >= 140.0 < 140.12.0 | 140.12.0 |
| rhel10 | firefox-flatpak | — | — |
| rhel10 | thunderbird-flatpak | — | — |
CVSS provenance
nvdv3.14.7MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
vendor_redhat4.7MEDIUM
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Red Hat
firefox: thunderbird: Information disclosure, sandbox escape in the Security: Process Sandboxing component
vendor_redhat·2026-06-16·CVSS 4.7
CVE-2026-12313 [MEDIUM] CWE-403 firefox: thunderbird: Information disclosure, sandbox escape in the Security: Process Sandboxing component
firefox: thunderbird: Information disclosure, sandbox escape in the Security: Process Sandboxing component
Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Information disclosure, sandbox escape in the Security: Process Sandboxing 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-flatp
Mozilla
Mozilla Foundation Security Advisory 2026-61: CVE-2026-12313
vendor_mozilla·CVSS 4.7
CVE-2026-12313 [MEDIUM] Mozilla Foundation Security Advisory 2026-61: CVE-2026-12313
Mozilla Foundation Security Advisory 2026-61
CVE: CVE-2026-12313
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 140.12
Mozilla
Mozilla Foundation Security Advisory 2026-58: CVE-2026-12313
vendor_mozilla·CVSS 4.7
CVE-2026-12313 [MEDIUM] Mozilla Foundation Security Advisory 2026-58: CVE-2026-12313
Mozilla Foundation Security Advisory 2026-58
CVE: CVE-2026-12313
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 140.12
Mozilla
Mozilla Foundation Security Advisory 2026-60: CVE-2026-12313
vendor_mozilla·CVSS 4.7
CVE-2026-12313 [MEDIUM] Mozilla Foundation Security Advisory 2026-60: CVE-2026-12313
Mozilla Foundation Security Advisory 2026-60
CVE: CVE-2026-12313
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 152
Mozilla
Mozilla Foundation Security Advisory 2026-57: CVE-2026-12313
vendor_mozilla·CVSS 4.7
CVE-2026-12313 [MEDIUM] Mozilla Foundation Security Advisory 2026-57: CVE-2026-12313
Mozilla Foundation Security Advisory 2026-57
CVE: CVE-2026-12313
Product: Firefox
Impact: high
Fixed in: Firefox 152
VulDB
Mozilla Firefox up to 151 Process Sandboxing sandbox (Nessus ID 321490 / WID-SEC-2026-1959)
vuldb·2026-07-09·CVSS 4.7
CVE-2026-12313 [MEDIUM] Mozilla Firefox up to 151 Process Sandboxing sandbox (Nessus ID 321490 / WID-SEC-2026-1959)
A vulnerability categorized as critical has been discovered in Mozilla Firefox up to 151. Affected by this vulnerability is an unknown functionality of the component Process Sandboxing. The manipulation results in sandbox issue.
This vulnerability is identified as CVE-2026-12313. The attack can be executed remotely. There is not any exploit available.
It is advisable to upgrade the affected component.
GHSA
Information disclosure, sandbox escape in the Security: Process Sandboxing component.
ghsa_unreviewed·2026-06-16
CVE-2026-12313 [MEDIUM] CWE-269 Information disclosure, sandbox escape in the Security: Process Sandboxing component.
Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152 and Firefox ESR 140.12.
No detection rules found.
No public exploits indexed.
2026-06-16
Published