CVE-2019-11707

HighCVSS 8.8/10Known exploited (CISA KEV)Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-843

Affected software

Vendor	Product	Versions
Mozilla	Firefox ESR	>= unspecified, < 60.7.1
Mozilla	Firefox	>= unspecified, < 67.0.3
Mozilla	Thunderbird	>= unspecified, < 60.7.2

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1544386Issue Tracking, Permissions Required, Vendor Advisory
https://security.gentoo.org/glsa/201908-12Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2019-18/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-20/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1544386Issue Tracking, Permissions Required, Vendor Advisory
https://security.gentoo.org/glsa/201908-12Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2019-18/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-20/Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-11707US Government Resource

Timeline

Published: Jul 23, 2019
Last modified: Jun 17, 2026
Added to CISA KEV: May 23, 2022
NVD status: Analyzed

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