CVE-2026-16360 json
Memory safety bugs fixed in Thunderbird ESR 140.13 and Thunderbird 153
published 3mo ago modified 16d ago also EUVD-2026-46251
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 40%
- public exploits
- 0
- none known
Summary
Memory safety bugs present in Thunderbird ESR 140.12 and Thunderbird 152. 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 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.
Patch / fix
- mozilla firefox 115.38.0, 140.13.0, 153.0.0
- mozilla thunderbird 140.13.0, 153.0
- firefox-esr Debian 12 140.13.0esr-1~deb12u1
- firefox-esr Debian 13 140.13.0esr-1~deb13u1
- firefox-esr Debian 14 140.13.0esr-1
- thunderbird Debian 12 1:140.13.0esr-2~deb12u1
- thunderbird Debian 13 1:140.13.0esr-2~deb13u1
- thunderbird Debian 14 1:140.13.0esr-1
debian advisories DEBIAN-CVE-2026-16360
- thunderbird RHEL 8 140.13.0-1.el8_10
- thunderbird RHEL 9 140.13.0-1.el9_8
- thunderbird RHEL 10.2 140.13.0-1.el10_2
- firefox RHEL 9 140.13.0-1.el9_8
- firefox-x11 RHEL 9 140.13.0-1.el9_8
- firefox RHEL 8 140.13.0-1.el8_10
- firefox RHEL 10.2 140.13.0-1.el10_2
- firefox RHEL 8.8 TUS, RHEL 8.8 E4S 140.13.0-1.el8_8
red hat advisories RHSA-2026:54339RHSA-2026:54259RHSA-2026:54249RHSA-2026:54248RHSA-2026:54185RHSA-2026:54182
- MozillaThunderbird SLE Workstation Extension 15 SP7, SLE Module for Package Hub 15 SP7 153.2.0-150400.13.3.1
- mozilla-nss SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +11 more 3.125-150400.3.74.1
- mozilla-nspr SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +11 more 4.39-150400.12.3.1
- MozillaFirefox SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 153.2.0-150400.157.5.1
- MozillaFirefox-branding-SLE SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 153-150400.14.3.1
- mozilla-nss SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 3.125-160000.1.1
- mozilla-nspr SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 4.39-160000.1.1
- rust-cbindgen SLES for SAP applications 16.0, SLES 16.0 0.29.4+git0-160000.1.1
suse advisories SUSE-SU-2026:4268-1SUSE-SU-2026:4156-1SUSE-SU-2026:4140-1SUSE-SU-2026:23411-1SUSE-SU-2026:23590-1SUSE-SU-2026:3546-1
- rust-cbindgen openSUSE Leap 16.0 0.29.4+git0-160000.1.1
- mozilla-nss openSUSE Leap 16.0 3.125-160000.1.1
- mozilla-nspr openSUSE Leap 16.0 4.39-160000.1.1
- MozillaFirefox openSUSE Leap 16.0 153.1.0-160000.1.2
- MozillaFirefox openSUSE Leap 16.0 140.13.0-160000.1.1
- MozillaFirefox openSUSE Tumbleweed 153.0-1.1
- MozillaThunderbird openSUSE Tumbleweed 140.13.0-1.1
- firefox-esr openSUSE Tumbleweed 140.13.0-1.1
opensuse advisories openSUSE-SU-2026:21713-1openSUSE-SU-2026:21519-1openSUSE-SU-2026:11358-1openSUSE-SU-2026:11359-1openSUSE-SU-2026:11329-1
- thunderbird AlmaLinux 9 140.13.0-1.el9_8.alma.1
- thunderbird AlmaLinux 8 140.13.0-1.el8_10.alma.1
- thunderbird AlmaLinux 10 140.13.0-1.el10_2.alma.1
- firefox AlmaLinux 10 140.13.0-1.el10_2
- firefox AlmaLinux 9 140.13.0-1.el9_8.alma.1
- firefox-x11 AlmaLinux 9 140.13.0-1.el9_8.alma.1
- firefox AlmaLinux 8 140.13.0-1.el8_10.alma.1
almalinux advisories ALSA-2026:49921ALSA-2026:49922ALSA-2026:49621ALSA-2026:47101ALSA-2026:47104ALSA-2026:47105
- thunderbird Rocky Linux 10 140.13.0-1.el10_2
- thunderbird Rocky Linux 9 140.13.0-1.el9_8
- thunderbird Rocky Linux 8 140.13.0-1.el8_10
- firefox Rocky Linux 9 140.13.0-1.el9_8
- firefox Rocky Linux 10 140.13.0-1.el10_2
- firefox Rocky Linux 8 140.13.0-1.el8_10
rocky linux advisories RLSA-2026:49621RLSA-2026:49921RLSA-2026:49922RLSA-2026:47104RLSA-2026:47101RLSA-2026:47105
Is CVE-2026-16360 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerVendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2026-16360 updated cvss 7.5
firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.38, Firefox ESR 140.13 and Firefox 153
-
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 140.13.0-1.el8_10, thunderbird 140.13.0-1.el8_10fixed: vendor fix RHSA-2026:47105
-
Red Hat Enterprise Linux AppStream (v. 9) firefox 140.13.0-1.el9_8, firefox-x11 140.13.0-1.el9_8, thunderbird 140.13.0-1.el9_8fixed: vendor fix RHSA-2026:47104
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Red Hat Enterprise Linux AppStream (v. 10) firefox 140.13.0-1.el10_2, thunderbird 140.13.0-1.el10_2fixed: vendor fix RHSA-2026:47101
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Red Hat Enterprise Linux AppStream AUS (v.8.4) firefox 140.13.0-1.el8_4, thunderbird 140.13.0-1.el8_4fixed: vendor fix RHSA-2026:54180
-
Red Hat Enterprise Linux AppStream AUS (v.8.6) firefox 140.13.0-1.el8_6, thunderbird 140.13.0-1.el8_6fixed: vendor fix RHSA-2026:54259
-
Red Hat Enterprise Linux AppStream E4S (v.8.8) firefox 140.13.0-1.el8_8, thunderbird 140.13.0-1.el8_8fixed: vendor fix RHSA-2026:54339
show 8 moreshow fewer
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Red Hat Enterprise Linux AppStream E4S (v.9.2) firefox 140.13.0-1.el9_2, firefox-x11 140.13.0-1.el9_2, thunderbird 140.13.0-1.el9_2fixed: vendor fix RHSA-2026:54185
-
Red Hat Enterprise Linux AppStream E4S (v.9.4) firefox 140.13.0-1.el9_4, firefox-x11 140.13.0-1.el9_4, thunderbird 140.13.0-1.el9_4fixed: vendor fix RHSA-2026:54182
-
Red Hat Enterprise Linux AppStream EUS (v. 10.0) firefox 140.13.0-1.el10_0, thunderbird 140.13.0-1.el10_0fixed: vendor fix RHSA-2026:54181
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Red Hat Enterprise Linux AppStream EUS (v.9.6) firefox 140.13.0-1.el9_6, firefox-x11 140.13.0-1.el9_6, thunderbird 140.13.0-1.el9_6fixed: vendor fix RHSA-2026:54249
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Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) firefox 140.13.0-1.el8_4, thunderbird 140.13.0-1.el8_4fixed: vendor fix RHSA-2026:54180
-
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) firefox 140.13.0-1.el8_6, thunderbird 140.13.0-1.el8_6fixed: vendor fix RHSA-2026:54259
-
Red Hat Enterprise Linux AppStream TUS (v.8.8) firefox 140.13.0-1.el8_8, thunderbird 140.13.0-1.el8_8fixed: vendor fix RHSA-2026:54339
-
Red Hat Enterprise Linux Server (v. 7 ELS) firefox 140.13.0-1.el7_9fixed: vendor fix RHSA-2026:54248
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
- total
- Assessed
- 3mo ago
Exploit prediction
0.47% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Mozilla Firefox
- Mozilla Thunderbird
Classification
- Weakness
-
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
References
-
mozilla.org
/security/advisories/mfsa2026-68/
vendor-advisory
-
mozilla.org
/security/advisories/mfsa2026-69/
vendor-advisory
-
mozilla.org
/security/advisories/mfsa2026-70/
vendor-advisory
-
mozilla.org
/security/advisories/mfsa2026-71/
vendor-advisory
-
mozilla.org
/security/advisories/mfsa2026-72/
vendor-advisory
-
bugzilla.mozilla.org
/buglist.cgi?bug_id=2022635%2C2028004%2C2035756%2C2045184%2C2045185%2C2045198%2C2045392%2C2045395%2C2045396%2C
broken-link
-
bugzilla.mozilla.org
/buglist.cgi?bug_id=2043739%2C2045281%2C2045614%2C2045744%2C2045775%2C2047719%2C2049805%2C2051666
permissions-required
Sources
- CVE List CVE-2026-16360
- NVD CVE-2026-16360
Fencer Intel 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.