critical 9.8

CVE-2019-11709 json

Mozilla developers and community members reported memory safety bugs present in Firefox 67 and Firefox ESR 60.7.

published 2019-07-23 7y ago modified 2026-06-17 4mo ago also EUVD-2019-3379

cvss: 9.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.3%; EPSS 2.3% chance of exploitation in 30 days, percentile 83%
public exploits: 0; none known

Mozilla developers and community members reported memory safety bugs present in Firefox 67 and Firefox ESR 60.7. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.

Patch / fix

fixed in 3 distros 7

Mozilla Firefox ESR 60.8
Mozilla Firefox 68
Mozilla Thunderbird 60.8

debian ubuntu red hat suse opensuse alpine arch linux

firefox-esr Debian 14, Debian 13, Debian 12 60.8.0esr-1
thunderbird Debian 14, Debian 13, Debian 12 1:60.8.0-1

debian advisories DEBIAN-CVE-2019-11709

firefox Ubuntu 16.04 LTS 68.0+build3-0ubuntu0.16.04.1
firefox Ubuntu 18.04 LTS 68.0+build3-0ubuntu0.18.04.1
thunderbird Ubuntu 16.04 LTS 1:60.8.0+build1-0ubuntu0.16.04.2
thunderbird Ubuntu 18.04 LTS 1:60.8.0+build1-0ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2019-11709

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

thunderbird RHEL 6 60.8.0-1.el6_10
thunderbird RHEL 7 60.8.0-1.el7_6
thunderbird RHEL 8 60.8.0-1.el8_0
firefox RHEL 8 60.8.0-1.el8_0
firefox RHEL 7 60.8.0-1.el7_6
firefox RHEL 6 60.8.0-1.el6_10

red hat advisories RHSA-2019:1777 RHSA-2019:1775 RHSA-2019:1799 RHSA-2019:1764 RHSA-2019:1763 RHSA-2019:1765

MozillaFirefox SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +18 more 68.1.0-109.89.1
MozillaFirefox-branding-SLE SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +16 more 68-32.8.1
MozillaThunderbird SLE Workstation Extension 15 SP1, SLE Workstation Extension 15 68.1.1-3.51.1
MozillaFirefox SLES 12 SP4, SLES 12 SP3-BCL, SLES 12 SP2-BCL +15 more 60.8.0-109.83.3
mozilla-nss SLES 12 SP4, SLES 12 SP3-BCL, SLES 12 SP2-BCL +15 more 3.44.1-58.28.1
MozillaThunderbird SLE Workstation Extension 15 SP1, SLE Workstation Extension 15 60.8.0-3.46.2
MozillaFirefox SLE Module for Desktop Applications 15 SP1, SLE Module for Desktop Applications 15 60.8.0-3.51.4
mozilla-nss SLE Module for Server Applications 15 SP1, SLE Module for Basesystem 15 SP1, SLE Module for Basesystem 15 3.44.1-3.16.2

suse advisories SUSE-SU-2019:14246-1 SUSE-SU-2019:2620-1 SUSE-SU-2019:2515-1 SUSE-SU-2019:1861-2 SUSE-SU-2019:1960-1 SUSE-SU-2019:1869-1

firefox-esr openSUSE Tumbleweed 128.5.1-1.1
MozillaFirefox openSUSE Tumbleweed 92.0-1.2
MozillaThunderbird openSUSE Tumbleweed 91.1.1-1.1
MozillaThunderbird openSUSE Leap 15.1 68.1.1-lp151.2.13.1
enigmail openSUSE Leap 15.1 2.1.2-lp151.2.6.1
MozillaThunderbird openSUSE Leap 15.0 68.1.1-lp150.3.51.1
enigmail openSUSE Leap 15.0 2.1.2-lp150.34.1
MozillaThunderbird Package Hub 12 60.8.0-88.1

opensuse advisories openSUSE-SU-2024:14572-1 openSUSE-SU-2024:10600-1 openSUSE-SU-2024:10601-1 openSUSE-SU-2019:2249-1 openSUSE-SU-2019:2248-1 openSUSE-SU-2019:1990-1

firefox-esr Alpine 3.10, Alpine 3.9 60.8.0-r0
firefox-esr Alpine 3.23, Alpine 3.22, Alpine 3.21 +10 more 68.0-r0

alpine advisories ALPINE-CVE-2019-11709

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

firefox Arch Linux 68.0-1

arch linux advisories AVG-1002

Is CVE-2019-11709 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.

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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-2019-11709 updated 2026-11-04 cvss 9.8

Mozilla: Memory safety bugs fixed in Firefox 68 and Firefox ESR 60.8

Red Hat Enterprise Linux 5 firefox
affected: no fix planned “Out of support scope”
Red Hat Enterprise Linux AppStream (v. 8) firefox 60.8.0-1.el8_0, thunderbird 60.8.0-1.el8_0
fixed: vendor fix RHSA-2019:1764
Red Hat Enterprise Linux Client (v. 7) firefox 60.8.0-1.el7_6, thunderbird 60.8.0-1.el7_6 Red Hat Enterprise Linux Client Optional (v. 7) firefox 60.8.0-1.el7_6
fixed: vendor fix RHSA-2019:1763
Red Hat Enterprise Linux Desktop (v. 6) firefox 60.8.0-1.el6_10, thunderbird 60.8.0-1.el6_10 Red Hat Enterprise Linux Desktop Optional (v. 6) firefox 60.8.0-1.el6_10
fixed: vendor fix RHSA-2019:1765
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) firefox 60.8.0-1.el7_6
fixed: vendor fix RHSA-2019:1763
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) thunderbird 60.8.0-1.el7_6
fixed: vendor fix RHSA-2019:1775
Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox 60.8.0-1.el6_10 Red Hat Enterprise Linux Server (v. 6) firefox 60.8.0-1.el6_10
fixed: vendor fix RHSA-2019:1765
Red Hat Enterprise Linux Server (v. 7) firefox 60.8.0-1.el7_6
fixed: vendor fix RHSA-2019:1763

show 6 more

Red Hat Enterprise Linux Server Optional (v. 6) firefox 60.8.0-1.el6_10, thunderbird 60.8.0-1.el6_10
fixed: vendor fix RHSA-2019:1765
Red Hat Enterprise Linux Server Optional (v. 7) firefox 60.8.0-1.el7_6, thunderbird 60.8.0-1.el7_6
fixed: vendor fix RHSA-2019:1763
Red Hat Enterprise Linux Workstation (v. 6) firefox 60.8.0-1.el6_10, thunderbird 60.8.0-1.el6_10
fixed: vendor fix RHSA-2019:1765
Red Hat Enterprise Linux Workstation (v. 7) firefox 60.8.0-1.el7_6, thunderbird 60.8.0-1.el7_6
fixed: vendor fix RHSA-2019:1763
Red Hat Enterprise Linux Workstation Optional (v. 6) firefox 60.8.0-1.el6_10
fixed: vendor fix RHSA-2019:1765
Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 60.8.0-1.el7_6
fixed: vendor fix RHSA-2019:1763

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

Exploit prediction

2.35% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

Mozilla Firefox ESR
Mozilla Firefox
Mozilla Thunderbird

Classification

Weakness

CWE-787 Out-of-bounds Write

References

lists.opensuse.org /opensuse-security-announce/2019-07/msg00055.html
vendor-advisory, mailing-list, third-party-advisory
lists.opensuse.org /opensuse-security-announce/2019-07/msg00058.html
vendor-advisory, mailing-list, third-party-advisory
security.gentoo.org /glsa/201908-12
vendor-advisory, third-party-advisory
security.gentoo.org /glsa/201908-20
vendor-advisory, third-party-advisory
lists.opensuse.org /opensuse-security-announce/2019-08/msg00073.html
vendor-advisory, mailing-list, third-party-advisory
lists.opensuse.org /opensuse-security-announce/2019-10/msg00010.html
vendor-advisory, mailing-list, third-party-advisory
lists.opensuse.org /opensuse-security-announce/2019-10/msg00009.html
vendor-advisory, mailing-list, third-party-advisory
mozilla.org /security/advisories/mfsa2019-21/
vendor-advisory
mozilla.org /security/advisories/mfsa2019-22/
vendor-advisory
mozilla.org /security/advisories/mfsa2019-23/
vendor-advisory
bugzilla.mozilla.org /buglist.cgi?bug_id=1547266%2C1540759%2C1548822%2C1550498%2C1515052%2C1539219%2C1547757%2C1550498%2C1533522
issue-tracking, vendor-advisory
lists.debian.org /debian-lts-announce/2019/08/msg00001.html
mailing-list, third-party-advisory
lists.debian.org /debian-lts-announce/2019/08/msg00002.html
mailing-list, third-party-advisory

Sources

CVE List CVE-2019-11709
NVD CVE-2019-11709

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.

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