CVE-2026-0885 json
Use-after-free in the JavaScript: GC component
published 2026-01-13 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-2077
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 34%
- public exploits
- 0
- none known
Summary
Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
Patch / fix
- mozilla firefox 140.7, 147
- mozilla firefox_esr 140.7, 147
- mozilla thunderbird 140.7, 147
- mozilla thunderbird_esr 140.7, 147
- firefox-esr Debian 12 140.7.0esr-1~deb12u1
- firefox-esr Debian 13 140.7.0esr-1~deb13u1
- firefox-esr Debian 14 140.7.0esr-1
- thunderbird Debian 12 1:140.7.0esr-1~deb12u1
- thunderbird Debian 13 1:140.7.0esr-1~deb13u1
- thunderbird Debian 14 1:140.7.0esr-1
debian advisories DEBIAN-CVE-2026-0885
- thunderbird Ubuntu 22.04 LTS 1:140.7.1+build1-0ubuntu0.22.04.1
ubuntu advisories UBUNTU-CVE-2026-0885
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- firefox RHEL 10.1 140.7.0-1.el10_1
- thunderbird RHEL 10.1 140.7.0-1.el10_1
- thunderbird RHEL 8 140.7.0-1.el8_10
- thunderbird RHEL 9 140.7.0-1.el9_7
- firefox RHEL 9 140.7.0-1.el9_7
- firefox-x11 RHEL 9 140.7.0-1.el9_7
- firefox RHEL 8 140.7.0-1.el8_10
- firefox enterprise linux eus 10.0 140.7.0-1.el10_0
red hat advisories RHSA-2026:2271RHSA-2026:2286RHSA-2026:2231RHSA-2026:2220RHSA-2026:2074RHSA-2026:2070
- MozillaFirefox SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +9 more 140.7.0-150200.152.216.1
- MozillaThunderbird SLE Workstation Extension 15 SP7, SLE Module for Package Hub 15 SP7, openSUSE Leap 15.6 140.7.0-150200.8.251.1
- MozillaFirefox SLES for SAP applications 16.0, SLES 16.0 140.7.0-160000.1.1
- MozillaFirefox SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 140.7.0-112.295.1
suse advisories SUSE-SU-2026:0260-1SUSE-SU-2026:0153-1SUSE-SU-2026:20086-1SUSE-SU-2026:0122-1
- MozillaThunderbird openSUSE Leap 16.0 140.8.1-bp160.1.1
- MozillaThunderbird openSUSE Tumbleweed 140.7.0-1.1
- MozillaFirefox openSUSE Leap 16.0 140.7.0-160000.1.1
- MozillaFirefox openSUSE Tumbleweed 147.0-1.1
- firefox-esr openSUSE Tumbleweed 140.7.0-1.1
opensuse advisories openSUSE-SU-2026:20391-1openSUSE-SU-2026:10058-1openSUSE-SU-2026:20041-1openSUSE-SU-2026:10046-1openSUSE-SU-2026:10037-1
- thunderbird AlmaLinux 8 140.7.0-1.el8_10.alma.1
- firefox AlmaLinux 10 140.7.0-1.el10_1
- thunderbird AlmaLinux 10 140.7.0-1.el10_1.alma.1
- thunderbird AlmaLinux 9 140.7.0-1.el9_7.alma.1
- firefox AlmaLinux 8 140.7.0-1.el8_10.alma.1
- firefox AlmaLinux 9 140.7.0-1.el9_7.alma.1
- firefox-x11 AlmaLinux 9 140.7.0-1.el9_7.alma.1
almalinux advisories ALSA-2026:2220ALSA-2026:2271ALSA-2026:2286ALSA-2026:0924ALSA-2026:0667ALSA-2026:0694
- thunderbird Rocky Linux 8 140.7.0-1.el8_10
- thunderbird Rocky Linux 9 140.7.0-1.el9_7
- firefox Rocky Linux 9 140.7.0-1.el9_7
- firefox Rocky Linux 8 140.7.0-1.el8_10
rocky linux advisories RLSA-2026:2220RLSA-2026:0924RLSA-2026:0694RLSA-2026:0667
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-2026-0885 updated cvss 6.1
firefox: thunderbird: Use-after-free in the JavaScript: GC component
-
Red Hat Enterprise Linux 6 firefox, thunderbird Red Hat Enterprise Linux 7 thunderbirdaffected: workaround, no fix planned “Out of support scope”
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Red Hat Enterprise Linux 10 rhel8/flatpak-runtime, rhel10/firefox-flatpakaffected: workaround, no fix available
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Red Hat Enterprise Linux AppStream (v. 8) firefox 140.7.0-1.el8_10, thunderbird 140.7.0-1.el8_10fixed: vendor fix RHSA-2026:0667
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Red Hat Enterprise Linux AppStream (v. 9) firefox 140.7.0-1.el9_7, firefox-x11 140.7.0-1.el9_7, thunderbird 140.7.0-1.el9_7fixed: vendor fix RHSA-2026:0694
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Red Hat Enterprise Linux AppStream (v. 10) firefox 140.7.0-1.el10_1, thunderbird 140.7.0-1.el10_1fixed: vendor fix RHSA-2026:2271
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Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox 140.7.0-1.el8_2, thunderbird 140.7.0-1.el8_2fixed: vendor fix RHSA-2026:2074
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Red Hat Enterprise Linux AppStream AUS (v.8.4) firefox 140.7.0-1.el8_4, thunderbird 140.7.0-1.el8_4fixed: vendor fix RHSA-2026:2073
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Red Hat Enterprise Linux AppStream AUS (v.8.6) firefox 140.7.0-1.el8_6, thunderbird 140.7.0-1.el8_6 Red Hat Enterprise Linux AppStream E4S (v.8.6) firefox 140.7.0-1.el8_6, thunderbird 140.7.0-1.el8_6fixed: vendor fix RHSA-2026:2070
show 10 moreshow fewer
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Red Hat Enterprise Linux AppStream E4S (v.8.8) firefox 140.7.0-1.el8_8, thunderbird 140.7.0-1.el8_8fixed: vendor fix RHSA-2026:2069
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Red Hat Enterprise Linux AppStream E4S (v.9.0) firefox 140.7.0-1.el9_0, thunderbird 140.7.0-1.el9_0fixed: vendor fix RHSA-2026:2047
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Red Hat Enterprise Linux AppStream E4S (v.9.2) firefox 140.7.0-1.el9_2, firefox-x11 140.7.0-1.el9_2, thunderbird 140.7.0-1.el9_2fixed: vendor fix RHSA-2026:2044
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Red Hat Enterprise Linux AppStream EUS (v. 10.0) firefox 140.7.0-1.el10_0, thunderbird 140.7.0-1.el10_0fixed: vendor fix RHSA-2026:2271
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Red Hat Enterprise Linux AppStream EUS (v.9.4) firefox 140.7.0-1.el9_4, firefox-x11 140.7.0-1.el9_4, thunderbird 140.7.0-1.el9_4fixed: vendor fix RHSA-2026:2041
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Red Hat Enterprise Linux AppStream EUS (v.9.6) firefox 140.7.0-1.el9_6, firefox-x11 140.7.0-1.el9_6, thunderbird 140.7.0-2.el9_6fixed: vendor fix RHSA-2026:2043
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Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) firefox 140.7.0-1.el8_4, thunderbird 140.7.0-1.el8_4fixed: vendor fix RHSA-2026:2073
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Red Hat Enterprise Linux AppStream TUS (v.8.6) firefox 140.7.0-1.el8_6, thunderbird 140.7.0-1.el8_6fixed: vendor fix RHSA-2026:2070
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Red Hat Enterprise Linux AppStream TUS (v.8.8) firefox 140.7.0-1.el8_8, thunderbird 140.7.0-1.el8_8fixed: vendor fix RHSA-2026:2069
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Red Hat Enterprise Linux Server (v. 7 ELS) firefox 140.7.0-1.el7_9fixed: vendor fix RHSA-2026:2231
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
- yes
- Technical impact
- partial
- Assessed
- 9 mo ago
Exploit prediction
0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L |
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L |
Affected products
- Mozilla Firefox
- Mozilla Thunderbird
Classification
- Weakness
-
- CWE-416 Use After Free
References
-
mozilla.org
/security/advisories/mfsa2026-01/
vendor-advisory
-
mozilla.org
/security/advisories/mfsa2026-03/
vendor-advisory
-
mozilla.org
/security/advisories/mfsa2026-04/
vendor-advisory
-
mozilla.org
/security/advisories/mfsa2026-05/
vendor-advisory
-
bugzilla.mozilla.org
/show_bug.cgi?id=2003607
permissions-required
Sources
- CVE List CVE-2026-0885
- NVD CVE-2026-0885
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.