CVE-2026-2807
published 2026-02-24CVE-2026-2807: Memory safety bugs present in Firefox 147 and Thunderbird 147. Some of these bugs showed evidence of memory corruption and we presume that with enough effort…
PriorityP349critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.24%
15.6th percentile
Memory safety bugs present in Firefox 147 and Thunderbird 147. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 148 and Thunderbird 148.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 148.0-1 (sid) | firefox 148.0-1 (sid) |
| mozilla | firefox | < 148.0 | 148.0 |
| mozilla | firefox | — | — |
| mozilla | thunderbird | < 148.0 | 148.0 |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
osv9.8CRITICAL
vendor_debian9.8CRITICAL
vendor_redhat9.8CRITICAL
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OSV
CVE-2026-2807: Memory safety bugs present in Firefox 147 and Thunderbird 147
osv·2026-02-24·CVSS 9.8
CVE-2026-2807 [CRITICAL] CVE-2026-2807: Memory safety bugs present in Firefox 147 and Thunderbird 147
Memory safety bugs present in Firefox 147 and Thunderbird 147. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 148 and Thunderbird < 148.
GHSA
GHSA-xx53-6qqj-gr7w: Memory safety bugs present in Firefox 147 and Thunderbird 147
ghsa_unreviewed·2026-02-24
CVE-2026-2807 [CRITICAL] CWE-787 GHSA-xx53-6qqj-gr7w: Memory safety bugs present in Firefox 147 and Thunderbird 147
Memory safety bugs present in Firefox 147 and Thunderbird 147. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 148.
Red Hat
firefox: thunderbird: Memory safety bugs fixed in Firefox 148 and Thunderbird 148
vendor_redhat·2026-02-24·CVSS 9.8
CVE-2026-2807 [CRITICAL] firefox: thunderbird: Memory safety bugs fixed in Firefox 148 and Thunderbird 148
firefox: thunderbird: Memory safety bugs fixed in Firefox 148 and Thunderbird 148
Memory safety bugs present in Firefox 147 and Thunderbird 147. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 148 and Thunderbird < 148.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Memory safety bugs present in Firefox 147 and Thunderbird 147. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
Statement: Red Hat Product Security rates the severity of this flaw as determined by the M
Debian
CVE-2026-2807: firefox - Memory safety bugs present in Firefox 147 and Thunderbird 147. Some of these bug...
vendor_debian·2026·CVSS 9.8
CVE-2026-2807 [CRITICAL] CVE-2026-2807: firefox - Memory safety bugs present in Firefox 147 and Thunderbird 147. Some of these bug...
Memory safety bugs present in Firefox 147 and Thunderbird 147. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 148 and Thunderbird < 148.
Scope: local
sid: resolved (fixed in 148.0-1)
Mozilla
Mozilla Foundation Security Advisory 2026-16: CVE-2026-2807
vendor_mozilla·CVSS 9.8
CVE-2026-2807 [CRITICAL] Mozilla Foundation Security Advisory 2026-16: CVE-2026-2807
Mozilla Foundation Security Advisory 2026-16
CVE: CVE-2026-2807
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 148
Mozilla
Mozilla Foundation Security Advisory 2026-13: CVE-2026-2807
vendor_mozilla·CVSS 9.8
CVE-2026-2807 [CRITICAL] Mozilla Foundation Security Advisory 2026-13: CVE-2026-2807
Mozilla Foundation Security Advisory 2026-13
CVE: CVE-2026-2807
Product: Firefox
Impact: high
Fixed in: Firefox 148
No detection rules found.
No public exploits indexed.
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1756056%2C1999402%2C2004872%2C2006037%2C2012855https://www.mozilla.org/security/advisories/mfsa2026-13/https://www.mozilla.org/security/advisories/mfsa2026-16/https://access.redhat.com/security/cve/CVE-2026-2807https://bugzilla.redhat.com/show_bug.cgi?id=2442296https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2807.json
2026-02-24
Published