CVE-2019-11707
HighExploitedPublic exploitA type confusion vulnerability can occur when manipulating JavaScript objects due to issues in Array.pop.
Published Jul 23, 2019 · Updated Aug 4, 2026 · Also known as ALPINE-CVE-2019-11707, DEBIAN-CVE-2019-11707, DLA-1829-1, DLA-1836-1, DSA-4466-1, DSA-4471-1, MFSA 2019-18, MFSA 2019-20, SUSE-RU-2019:1625-1, SUSE-SU-2019:14124-1, SUSE-SU-2019:1629-1, UBUNTU-CVE-2019-11707, USN-4020-1, USN-4045-1
Key Facts
Patch immediately- CVE-2019-11707 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Firefox (Mozilla), Thunderbird (Mozilla), firefox-developer-edition (arch) and 17 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jun 18, 2019. Public exploit code is available.
- EPSS estimates a 38% probability of exploitation in the next 30 days.
- Fixed versions are available, including Firefox 0:60.7.2-1.el6_10, Firefox 0:60.7.2-1.el7_6, Firefox 0:60.7.2-3.el8_0.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
38%
Higher than 98.5% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2019-11707 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
A type confusion vulnerability can occur when manipulating JavaScript objects due to issues in Array.pop. This can allow for an exploitable crash. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Firefox ESR < 60.7.1, Firefox < 67.0.3, and Thunderbird < 60.7.2.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | May 23, 2022 | Jun 13, 2022 | Not reported |
| Industry KEV feed | Jun 18, 2019 | Jun 13, 2022 | Not reported |
| CIRCL KEV | May 23, 2022 | Jun 13, 2022 | Not reported |
| ENISA EUVD | May 23, 2022 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
181 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| FirefoxMozilla | >= unspecified | 67.0.3 |
| ThunderbirdMozilla | >= unspecified | 60.7.2 |
| firefox-developer-editionarch | See advisory | 68.0b11-1 |
| Firefox ESRalpine | >= unspecified | 60.7.1-r0 |
| mozjs60alpine | See advisory | 60.7.2-r0 |
Patched Releases
Firefox
0:60.7.2-1.el6_10, 0:60.7.2-1.el7_6, 0:60.7.2-3.el8_0, 60.7.2-1.0.1.el6_10, 60.7.2-1.0.1.el7_6, 60.7.2-3.0.2.el8_0, 67.0.3-1, 67.0.3+build1-0ubuntu0.16.04.1, 67.0.3+build1-0ubuntu0.18.04.1, 67.0.3, 60.7.1
Firefox ESR
60.7.1, 128.5.1-1.1, 60.7.1-r0, 60.7.1esr-1, 60.7.1esr-1~deb8u1, 60.7.1esr-1~deb9u1
firefox-developer-edition
68.0b11-1
firefox-esr-branding-upstream
128.5.1-1.1
firefox-esr-translations-common
128.5.1-1.1
firefox-esr-translations-other
128.5.1-1.1
Thunderbird
60.7.2, 0:60.7.2-2.el6_10, 0:60.7.2-2.el7_6, 0:60.7.2-2.el8_0, 1:60.7.2-1, 1:60.7.2-1~deb8u1, 1:60.7.2-1~deb9u1, 1:60.7.2+build2-0ubuntu0.16.04.1, 1:60.7.2+build2-0ubuntu0.18.04.1, 60.7.2-2.0.1.el6_10, 60.7.2-2.0.1.el7_6, 60.7.2-2.0.1.el8_0, 60.7.2-2.amzn2.0.1
MozillaFirefox
60.7.1-109.77.1, 60.7.1-3.45.1, 60.7.2-lp150.3.59.1, 60.8.0esr-78.43.2, 92.0-1.2
MozillaFirefox-branding-upstream
60.7.2-lp150.3.59.1, 92.0-1.2
MozillaFirefox-buildsymbols
60.7.2-lp150.3.59.1
MozillaFirefox-devel
60.7.1-109.77.1, 60.7.1-3.45.1, 60.7.2-lp150.3.59.1, 92.0-1.2
MozillaFirefox-translations-common
60.7.1-109.77.1, 60.7.1-3.45.1, 60.7.2-lp150.3.59.1, 60.8.0esr-78.43.2, 92.0-1.2
MozillaFirefox-translations-other
60.7.1-3.45.1, 60.7.2-lp150.3.59.1, 60.8.0esr-78.43.2, 92.0-1.2
MozillaThunderbird
60.7.2-3.43.1, 60.7.2-85.1, 60.7.2-98.1, 60.7.2-lp151.2.7.1, 91.1.1-1.1
MozillaThunderbird-buildsymbols
60.7.2-85.1, 60.7.2-98.1, 60.7.2-lp151.2.7.1
MozillaThunderbird-translations-common
60.7.2-3.43.1, 60.7.2-85.1, 60.7.2-98.1, 60.7.2-lp151.2.7.1, 91.1.1-1.1
MozillaThunderbird-translations-other
60.7.2-3.43.1, 60.7.2-85.1, 60.7.2-98.1, 60.7.2-lp151.2.7.1, 91.1.1-1.1
mozjs60
60.7.2-r0, NA
mozjs68
60.7.2-r0
Timeline
Added to Industry KEV feed
Jun 18, 2019
Publicly disclosed
Jul 23, 2019
Added to CISA KEV
May 23, 2022
Added to CIRCL KEV
May 23, 2022
Added to ENISA EUVD
May 23, 2022
Last updated
Aug 4, 2026
Weakness Type
- CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')
References
- advisoryRHSA-2019:1603
- advisoryRHSA-2019:1604
- advisoryRHSA-2019:1623
- advisoryRHSA-2019:1624
- advisoryRHSA-2019:1626
FAQ
Common Questions.
A type confusion vulnerability can occur when manipulating JavaScript objects due to issues in Array.pop.
Affected: Firefox (Mozilla) versions >= unspecified; Thunderbird (Mozilla) versions >= unspecified; firefox-developer-edition (arch), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jun 18, 2019.
Yes. It was added on May 23, 2022 with a federal remediation due date of Jun 13, 2022.
Public exploit code is available.
Fixed versions are available, including Firefox 0:60.7.2-1.el6_10, Firefox 0:60.7.2-1.el7_6, Firefox 0:60.7.2-3.el8_0.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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