AEGLIX vulnerability intelligence
CVE-2019-17026
HIGH · CVSS 8.8 · Analyzed
Published: 2020-03-02 · Updated: 2026-06-17 · Source: NVD
Vulnerability overview
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.
Severity and scoring
- CVSS score
- 8.8 · HIGH
- CVSS version
- 3.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-843
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Listed in CISA’s Known Exploited Vulnerabilities catalog.
- Affected product
- Mozilla · Firefox and Thunderbird
- Added to catalog
- 2021-11-03
- Required action
- Apply updates per vendor instructions.
- CISA remediation due date
- 2022-05-03
CISA deadlines apply to the organizations covered by its directives. Confirm your own remediation requirements.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
Before (exclusive): 68.4.1
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
Before (exclusive): 72.0.1
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Before (exclusive): 68.4.1
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and references
- http://packetstormsecurity.com/files/162568/Firefox-72-IonMonkey-JIT-Type-Confusion.html
Exploit · Third Party Advisory · VDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1607443
Issue Tracking
- https://security.gentoo.org/glsa/202003-02
Third Party Advisory
- https://usn.ubuntu.com/4335-1/
Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-03/
Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-04/
Vendor Advisory
- http://packetstormsecurity.com/files/162568/Firefox-72-IonMonkey-JIT-Type-Confusion.html
Exploit · Third Party Advisory · VDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1607443
Issue Tracking
- https://security.gentoo.org/glsa/202003-02
Third Party Advisory
- https://usn.ubuntu.com/4335-1/
Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-03/
Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-04/
Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-17026
US Government Resource