CVE-2026-12317
published 2026-06-16CVE-2026-12317: Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
PriorityP337high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.29%
20.7th percentile
Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 152 | Firefox 152 |
| mozilla | thunderbird | < Thunderbird 152 | Thunderbird 152 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vendor_redhat7.5HIGH
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VulDB
Mozilla Firefox up to 151 memory corruption (Nessus ID 321481 / WID-SEC-2026-1959)
vuldb·2026-07-09·CVSS 7.5
CVE-2026-12317 [HIGH] Mozilla Firefox up to 151 memory corruption (Nessus ID 321481 / WID-SEC-2026-1959)
A vulnerability, which was classified as critical, was found in Mozilla Firefox up to 151. This affects an unknown function. Such manipulation leads to memory corruption.
This vulnerability is traded as CVE-2026-12317. The attack may be launched remotely. There is no exploit available.
You should upgrade the affected component.
GHSA
Memory safety bug fixed in Firefox 152.
ghsa_unreviewed·2026-06-16
CVE-2026-12317 [HIGH] CWE-119 Memory safety bug fixed in Firefox 152.
Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152.
Red Hat
firefox: thunderbird: Memory safety bug fixed in Firefox 152
vendor_redhat·2026-06-16·CVSS 7.5
CVE-2026-12317 [HIGH] CWE-825 firefox: thunderbird: Memory safety bug fixed in Firefox 152
firefox: thunderbird: Memory safety bug fixed in Firefox 152
Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Memory safety bug fixed in Thunderbird 152
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) - Not affected
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Not affected
Package: rhel10/thunderbird-flatpak (Red Hat Enterprise Linux 10) - Not affected
Package: thunderbird (Red Hat Enterprise Linux 10) - Not affected
Package: firefox (Red Hat Enterprise Linux 6) - Not
Mozilla
Mozilla Foundation Security Advisory 2026-57: CVE-2026-12317
vendor_mozilla·CVSS 7.5
CVE-2026-12317 [HIGH] Mozilla Foundation Security Advisory 2026-57: CVE-2026-12317
Mozilla Foundation Security Advisory 2026-57
CVE: CVE-2026-12317
Product: Firefox
Impact: high
Fixed in: Firefox 152
Mozilla
Mozilla Foundation Security Advisory 2026-60: CVE-2026-12317
vendor_mozilla·CVSS 7.5
CVE-2026-12317 [HIGH] Mozilla Foundation Security Advisory 2026-60: CVE-2026-12317
Mozilla Foundation Security Advisory 2026-60
CVE: CVE-2026-12317
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 152
No detection rules found.
No public exploits indexed.
2026-06-16
Published