CVE-2026-92029 json
Use-after-free in the SVG component
published 2026-09-15 54 d ago modified 2026-10-06 33 d ago also EUVD-2026-78492
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 25%
- public exploits
- 0
- none known
Summary
Use-after-free in the SVG component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
Patch / fix
- mozilla firefox 115.41.0, 140.16.0, 153.3.0, 156.0.0
- mozilla thunderbird 140.16.0, 153.3.0, 156.0
- firefox-esr Debian 12 140.16.0esr-1~deb12u1
- firefox-esr Debian 13 140.16.0esr-1~deb13u1
- firefox-esr Debian 14 140.16.0esr-1
- thunderbird Debian 12 1:140.16.0esr-1~deb12u1
- thunderbird Debian 13 1:140.16.0esr-1~deb13u1
- thunderbird Debian 14 1:153.3.0esr-1
debian advisories DEBIAN-CVE-2026-92029
- thunderbird RHEL 8 140.16.0-1.el8_10
- thunderbird RHEL 10.2 140.16.0-1.el10_2
- firefox RHEL 8 140.16.0-1.el8_10
- thunderbird RHEL 9 140.16.0-1.el9_8
- firefox RHEL 9 140.16.0-1.el9_8
- firefox-x11 RHEL 9 140.16.0-1.el9_8
- firefox RHEL 10.2 140.16.0-1.el10_2
- firefox RHEL 7 ELS 140.16.0-1.el7_9
red hat advisories RHSA-2026:83496RHSA-2026:83077RHSA-2026:83076RHSA-2026:82818RHSA-2026:82817RHSA-2026:82779
- MozillaThunderbird SLE Workstation Extension 15 SP7, SLE Module for Package Hub 15 SP7 153.4.0-150400.13.6.1
- MozillaFirefox SLES for SAP applications 16.0, SLES 16.0 153.3.0-160000.1.1
- MozillaFirefox SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 153.3.0-150400.157.8.1
- MozillaFirefox SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 153.3.0-118.8.1
suse advisories SUSE-SU-2026:4627-1SUSE-SU-2026:23918-1SUSE-SU-2026:4264-1SUSE-SU-2026:4247-1
- MozillaFirefox openSUSE Leap 16.0 153.3.0-160000.1.1
- MozillaFirefox openSUSE Tumbleweed 156.0-1.1
- MozillaThunderbird openSUSE Tumbleweed 140.16.0-1.1
- firefox-esr openSUSE Tumbleweed 153.3.0-1.1
opensuse advisories openSUSE-SU-2026:21951-1openSUSE-SU-2026:11826-1openSUSE-SU-2026:11827-1openSUSE-SU-2026:11796-1
- thunderbird AlmaLinux 8 140.16.0-1.el8_10.alma.1
- thunderbird AlmaLinux 10 140.16.0-1.el10_2.alma.1
- firefox AlmaLinux 8 140.16.0-1.el8_10.alma.1
- thunderbird AlmaLinux 9 140.16.0-1.el9_8.alma.1
- firefox AlmaLinux 10 140.16.0-1.el10_2
- firefox AlmaLinux 9 140.16.0-1.el9_8.alma.1
- firefox-x11 AlmaLinux 9 140.16.0-1.el9_8.alma.1
almalinux advisories ALSA-2026:73971ALSA-2026:73130ALSA-2026:71652ALSA-2026:70642ALSA-2026:69461ALSA-2026:69462
- thunderbird Rocky Linux 8 140.16.0-1.el8_10
- thunderbird Rocky Linux 10 140.16.0-1.el10_2
- firefox Rocky Linux 8 140.16.0-1.el8_10
- thunderbird Rocky Linux 9 140.16.0-1.el9_8
- firefox Rocky Linux 9 140.16.0-1.el9_8
- firefox Rocky Linux 10 140.16.0-1.el10_2
rocky linux advisories RLSA-2026:73971RLSA-2026:73130RLSA-2026:71652RLSA-2026:70642RLSA-2026:69462RLSA-2026:69461
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2026-92029 updated cvss 7.5
firefox: thunderbird: Use-after-free in the SVG component
-
Red Hat Enterprise Linux 6 firefox, thunderbird Red Hat Enterprise Linux 7 thunderbirdaffected: no fix planned “Out of support scope”
-
Red Hat Enterprise Linux 10 rhel10/firefox-flatpak, rhel10/thunderbird-flatpakaffected: no fix available
-
Red Hat Enterprise Linux AppStream (v. 8) firefox 140.16.0-1.el8_10, thunderbird 140.16.0-1.el8_10fixed: vendor fix RHSA-2026:71652
-
Red Hat Enterprise Linux AppStream (v. 9) firefox 140.16.0-1.el9_8, firefox-x11 140.16.0-1.el9_8, thunderbird 140.16.0-1.el9_8fixed: vendor fix RHSA-2026:69462
-
Red Hat Enterprise Linux AppStream (v. 10) firefox 140.16.0-1.el10_2, thunderbird 140.16.0-1.el10_2fixed: vendor fix RHSA-2026:69461
-
Red Hat Enterprise Linux AppStream AUS (v.8.4) firefox 140.16.0-1.el8_4, thunderbird 140.16.0-1.el8_4fixed: vendor fix RHSA-2026:82779
-
Red Hat Enterprise Linux AppStream AUS (v.8.6) firefox 140.16.0-1.el8_6, thunderbird 140.16.0-1.el8_6fixed: vendor fix RHSA-2026:83076
-
Red Hat Enterprise Linux AppStream E4S (v.8.8) firefox 140.16.0-1.el8_8, thunderbird 140.16.0-1.el8_8fixed: vendor fix RHSA-2026:82720
show 8 moreshow fewer
-
Red Hat Enterprise Linux AppStream E4S (v.9.2) firefox 140.16.0-1.el9_2, firefox-x11 140.16.0-1.el9_2, thunderbird 140.16.0-1.el9_2fixed: vendor fix RHSA-2026:82780
-
Red Hat Enterprise Linux AppStream E4S (v.9.4) firefox 140.16.0-1.el9_4, firefox-x11 140.16.0-1.el9_4, thunderbird 140.16.0-1.el9_4fixed: vendor fix RHSA-2026:83077
-
Red Hat Enterprise Linux AppStream EUS (v. 10.0) firefox 140.16.0-1.el10_0, thunderbird 140.16.0-1.el10_0fixed: vendor fix RHSA-2026:82818
-
Red Hat Enterprise Linux AppStream EUS (v.9.6) firefox 140.16.0-1.el9_6, firefox-x11 140.16.0-1.el9_6, thunderbird 140.16.0-1.el9_6fixed: vendor fix RHSA-2026:82817
-
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) firefox 140.16.0-1.el8_4, thunderbird 140.16.0-1.el8_4fixed: vendor fix RHSA-2026:82779
-
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) firefox 140.16.0-1.el8_6, thunderbird 140.16.0-1.el8_6fixed: vendor fix RHSA-2026:83076
-
Red Hat Enterprise Linux AppStream TUS (v.8.8) firefox 140.16.0-1.el8_8, thunderbird 140.16.0-1.el8_8fixed: vendor fix RHSA-2026:82720
-
Red Hat Enterprise Linux Server (v. 7 ELS) firefox 140.16.0-1.el7_9fixed: vendor fix RHSA-2026:83496
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 50 d ago
Exploit prediction
0.32% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Affected products
- Mozilla Firefox
- Mozilla Thunderbird
Classification
- Weakness
-
- CWE-416 Use After Free
References
-
mozilla.org
/security/advisories/mfsa2026-90/
vendor-advisory
-
mozilla.org
/security/advisories/mfsa2026-91/
vendor-advisory
-
mozilla.org
/security/advisories/mfsa2026-92/
vendor-advisory
-
mozilla.org
/security/advisories/mfsa2026-93/
vendor-advisory
-
mozilla.org
/security/advisories/mfsa2026-94/
vendor-advisory
-
mozilla.org
/security/advisories/mfsa2026-95/
vendor-advisory
-
mozilla.org
/security/advisories/mfsa2026-96/
vendor-advisory
-
bugzilla.mozilla.org
/show_bug.cgi?id=2068445
permissions-required
Sources
- CVE List CVE-2026-92029
- NVD CVE-2026-92029
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