CVE-2019-17026

8.8 HIGH CISA KEV - Actively Exploited
Published: March 02, 2020 Modified: November 04, 2025
View on NVD

Description

Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Firefox ESR < 68.4.1, Thunderbird < 68.4.1, and Firefox < 72.0.1.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://packetstormsecurity.com/files/162568/Firefox-72-IonMonkey-JIT-Type-Confusion.html
Source: security@mozilla.org
Exploit Third Party Advisory VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1607443
Source: security@mozilla.org
Issue Tracking
https://security.gentoo.org/glsa/202003-02
Source: security@mozilla.org
Third Party Advisory
https://usn.ubuntu.com/4335-1/
Source: security@mozilla.org
Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2020-03/
Source: security@mozilla.org
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-04/
Source: security@mozilla.org
Vendor Advisory
http://packetstormsecurity.com/files/162568/Firefox-72-IonMonkey-JIT-Type-Confusion.html
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit Third Party Advisory VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1607443
Source: af854a3a-2127-422b-91ae-364da2661108
Issue Tracking
https://security.gentoo.org/glsa/202003-02
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://usn.ubuntu.com/4335-1/
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2020-03/
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-04/
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-17026
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
US Government Resource

13 reference(s) from NVD

Quick Stats

CVSS v3 Score
8.8 / 10.0
EPSS (Exploit Probability)
64.8%
98th percentile
Exploitation Status
Actively Exploited
Remediation due: 2022-05-03

Weaknesses (CWE)

CWE-843 CWE-843

Affected Vendors

mozilla canonical

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