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CVE-2019-17026Mozilla Firefox And Thunderbird Type Confusion Vulnerability
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.
8.8 HIGHEPSS 46.31%⚡ Known Exploited (CISA KEV)NVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 8.8 | HIGH | 3.1NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| 6.8 | MEDIUM | 2.0NVD | AV:N/AC:M/Au:N/C:P/I:P/A:P |
CISA required action
⚡ Known exploited · remediation due May 3, 2022
Apply updates per vendor instructions.
Details
- CVE ID
- CVE-2019-17026
- Status
- Analyzed
- Assigner (CNA)
- mozilla
- Published
- Mar 2, 2020
- Last modified
- 2026-06-17 02:23 UTC
- Weaknesses
Affected Products
As published by the CNA in the CVE record.
MozillaFirefox ESR1 version range
- before 68.4.1
MozillaThunderbird1 version range
- before 68.4.1
MozillaFirefox1 version range
- before 72.0.1
References
- packetstormsecurity.com http://packetstormsecurity.com/files/162568/Firefox-72-IonMonkey-JIT-Type-Confusion.html
- bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=1607443
- security.gentoo.org https://security.gentoo.org/glsa/202003-02
- usn.ubuntu.com https://usn.ubuntu.com/4335-1/
- mozilla.org https://www.mozilla.org/security/advisories/mfsa2020-03/
- mozilla.org https://www.mozilla.org/security/advisories/mfsa2020-04/
- cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-17026