CVE-2026-6746
published 2026-04-21CVE-2026-6746: Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and…
PriorityP341high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.59%
44.1th percentile
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Affected
11 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 150 | Firefox 150 |
| mozilla | firefox | < 115.35.0 | 115.35.0 |
| mozilla | firefox | < 150.0 | 150.0 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= 140.0 < 140.10.0 | 140.10.0 |
| mozilla | firefox_esr | < Firefox ESR 140.10 | Firefox ESR 140.10 |
| mozilla | firefox_esr | < Firefox ESR 115.35 | Firefox ESR 115.35 |
| mozilla | thunderbird | < Thunderbird 150 | Thunderbird 150 |
| mozilla | thunderbird | < Thunderbird 140.10 | Thunderbird 140.10 |
| mozilla | thunderbird | < 140.10.0 | 140.10.0 |
| rhel10 | firefox-flatpak | — | — |
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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Red Hat
firefox: Use-after-free in the DOM: Core & HTML component
vendor_redhat·2026-04-21·CVSS 7.5
CVE-2026-6746 [HIGH] CWE-825 firefox: Use-after-free in the DOM: Core & HTML component
firefox: Use-after-free in the DOM: Core & HTML component
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue:
Use-after-free in the DOM: Core & HTML 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: firefox (Red Hat Enterprise Linux 6) - Out of support scope
Package: firefox (Red Hat Enterprise Linux 7) - Affected
Package: firefox (Red
Mozilla
Mozilla Foundation Security Advisory 2026-33: CVE-2026-6746
vendor_mozilla·CVSS 7.5
CVE-2026-6746 [HIGH] Mozilla Foundation Security Advisory 2026-33: CVE-2026-6746
Mozilla Foundation Security Advisory 2026-33
CVE: CVE-2026-6746
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 150
Mozilla
Mozilla Foundation Security Advisory 2026-30: CVE-2026-6746
vendor_mozilla·CVSS 7.5
CVE-2026-6746 [HIGH] Mozilla Foundation Security Advisory 2026-30: CVE-2026-6746
Mozilla Foundation Security Advisory 2026-30
CVE: CVE-2026-6746
Product: Firefox
Impact: high
Fixed in: Firefox 150
Mozilla
Mozilla Foundation Security Advisory 2026-32: CVE-2026-6746
vendor_mozilla·CVSS 7.5
CVE-2026-6746 [HIGH] Mozilla Foundation Security Advisory 2026-32: CVE-2026-6746
Mozilla Foundation Security Advisory 2026-32
CVE: CVE-2026-6746
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 140.10
Mozilla
Mozilla Foundation Security Advisory 2026-34: CVE-2026-6746
vendor_mozilla·CVSS 7.5
CVE-2026-6746 [HIGH] Mozilla Foundation Security Advisory 2026-34: CVE-2026-6746
Mozilla Foundation Security Advisory 2026-34
CVE: CVE-2026-6746
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 140.10
Mozilla
Mozilla Foundation Security Advisory 2026-31: CVE-2026-6746
vendor_mozilla·CVSS 7.5
CVE-2026-6746 [HIGH] Mozilla Foundation Security Advisory 2026-31: CVE-2026-6746
Mozilla Foundation Security Advisory 2026-31
CVE: CVE-2026-6746
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 115.35
GHSA
GHSA-r37m-3hw5-974w: Use-after-free in the DOM: Core & HTML component
ghsa_unreviewed·2026-04-21
CVE-2026-6746 [HIGH] CWE-416 GHSA-r37m-3hw5-974w: Use-after-free in the DOM: Core & HTML component
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-43408 kernel: ceph: add a bunch of missing ceph_path_info initializers
bugzilla·2026-05-08
CVE-2026-43408 [MEDIUM] CVE-2026-43408 kernel: ceph: add a bunch of missing ceph_path_info initializers
CVE-2026-43408 kernel: ceph: add a bunch of missing ceph_path_info initializers
In the Linux kernel, the following vulnerability has been resolved:
ceph: add a bunch of missing ceph_path_info initializers
ceph_mdsc_build_path() must be called with a zero-initialized
ceph_path_info parameter, or else the following
ceph_mdsc_free_path_info() may crash.
Example crash (on Linux 6.18.12):
virt_to_cache: Object is not a Slab page!
WARNING: CPU: 184 PID: 2871736 at mm/slub.c:6732 kmem_cache_free+0x316/0x400
[...]
Call Trace:
[...]
ceph_open+0x13d/0x3e0
do_dentry_open+0x134/0x480
vfs_open+0x2a/0xe0
path_openat+0x9a3/0x1160
[...]
cache_from_obj: Wrong slab cache. names_cache but object is from ceph_inode_info
WARNING: CPU: 184 PID: 2871736 at mm/slub.c:6746 kmem_cache_free+0x2dd/0x400
[...]
ke
Bugzilla
CVE-2026-6746 firefox: Use-after-free in the DOM: Core & HTML component
bugzilla·2026-04-21·CVSS 7.5
CVE-2026-6746 [HIGH] CVE-2026-6746 firefox: Use-after-free in the DOM: Core & HTML component
CVE-2026-6746 firefox: Use-after-free in the DOM: Core & HTML component
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.
https://bugzilla.mozilla.org/show_bug.cgi?id=2014596https://www.mozilla.org/security/advisories/mfsa2026-30/https://www.mozilla.org/security/advisories/mfsa2026-31/https://www.mozilla.org/security/advisories/mfsa2026-32/https://www.mozilla.org/security/advisories/mfsa2026-33/https://www.mozilla.org/security/advisories/mfsa2026-34/https://access.redhat.com/errata/RHSA-2026:10757https://access.redhat.com/errata/RHSA-2026:10766https://access.redhat.com/errata/RHSA-2026:10767https://access.redhat.com/errata/RHSA-2026:12285https://access.redhat.com/errata/RHSA-2026:13537https://access.redhat.com/errata/RHSA-2026:15892https://access.redhat.com/errata/RHSA-2026:17477https://access.redhat.com/errata/RHSA-2026:17687https://access.redhat.com/errata/RHSA-2026:17688https://access.redhat.com/errata/RHSA-2026:17689https://access.redhat.com/errata/RHSA-2026:17690https://access.redhat.com/errata/RHSA-2026:19041https://access.redhat.com/errata/RHSA-2026:19131https://access.redhat.com/errata/RHSA-2026:19201https://access.redhat.com/errata/RHSA-2026:19348https://access.redhat.com/errata/RHSA-2026:19461https://access.redhat.com/errata/RHSA-2026:19462https://access.redhat.com/errata/RHSA-2026:19463https://access.redhat.com/errata/RHSA-2026:19464https://access.redhat.com/errata/RHSA-2026:19465https://access.redhat.com/errata/RHSA-2026:19466https://access.redhat.com/errata/RHSA-2026:19467https://access.redhat.com/errata/RHSA-2026:19468https://access.redhat.com/errata/RHSA-2026:19469https://access.redhat.com/errata/RHSA-2026:19542https://access.redhat.com/errata/RHSA-2026:19655https://access.redhat.com/errata/RHSA-2026:19704https://access.redhat.com/security/cve/CVE-2026-6746https://bugzilla.redhat.com/show_bug.cgi?id=2460112https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6746.json
2026-04-21
Published