CVEvulnerability

CVE-2019-11707

8.8 HIGH Known exploited Published 2019-07-23 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Mozilla Firefox and Thunderbird Type Confusion Vulnerability — Mozilla Firefox and Thunderbird

Mozilla Firefox and Thunderbird contain a type confusion vulnerability that can occur when manipulating JavaScript objects due to issues in Array.pop, allowing for an exploitable crash.

Added to KEV: 2022-05-23
Remediation due: 2022-06-13
Ransomware use: Unknown
Required action: Apply updates per vendor instructions.
Notes: https://nvd.nist.gov/vuln/detail/CVE-2019-11707

Status: Analyzed
Published: 2019-07-23
Last modified: 2026-06-17
Assigner: [email protected]
CVSS 3.1 ([email protected]): 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0): 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected]): 7.5 HIGH — AV:N/AC:L/Au:N/C:P/I:P/A:P
Weaknesses: CWE-843

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.

Affected configurations

• mozilla firefox (< 60.7.1) • mozilla firefox (< 67.0.3) • mozilla thunderbird (< 60.7.2)

Weakness · CWE (1)

CWE-843 Access of Resource Using Incompatible Type weakness

References