CVE-2019-11709

Name: CVE-2019-11709
Creator: NVD / NIST
Published: 2019-07-23T14:15:15.39+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.35%

Last modified Jun 17, 2026

CVE-2019-11709 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 2.35% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

2.35%

81.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 60.8.0
Mozilla	Firefox	< 68.0
Mozilla	Thunderbird	< 60.8.0
Opensuse	Leap	15.0
Opensuse	Leap	15.1
Suse	Package Hub	All versions
Debian	Debian Linux	8.0

References

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00055.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00058.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00073.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.htmlMailing List, Third Party Advisory
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1547266%2C1540759%2C1548822%2C1550498%2C1515052%2C1539219%2C1547757%2C1550498%2C1533522Issue Tracking, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2019/08/msg00001.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/08/msg00002.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/201908-12Third Party Advisory
https://security.gentoo.org/glsa/201908-20Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2019-21/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-22/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-23/Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00055.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00058.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00073.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.htmlMailing List, Third Party Advisory
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1547266%2C1540759%2C1548822%2C1550498%2C1515052%2C1539219%2C1547757%2C1550498%2C1533522Issue Tracking, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2019/08/msg00001.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/08/msg00002.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/201908-12Third Party Advisory
https://security.gentoo.org/glsa/201908-20Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2019-21/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-22/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-23/Vendor Advisory

Timeline

Published: Jul 23, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-11709?

How severe is CVE-2019-11709?

CVE-2019-11709 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.35% probability of exploitation in the next 30 days.

How do I fix CVE-2019-11709?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-11709?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST