CVE-2019-17026
KEVHIGH 8.8EPSS 46.3%
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.
- Affected
- Mozilla · Firefox ESR · Thunderbird · Firefox
- CVSS v3.1 NVD
- 8.8 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS v2.0 NVD
- 6.8 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P - EPSS
- 46.31% chance of exploitation in the next 30 days, 99th percentile
- CISA KEV
- added 2021-11-03
- Published
- 2020-03-02
- Updated
- 2025-10-21
Proof-of-concept exploits (4)
- http://packetstormsecurity.com/files/162568/Firefox-72-IonMonkey-JIT-Type-Confusion.html
- forrest-orr/DoubleStar147★ · 2022-05-23
- lsw29475/CVE-2019-170263★ · 2021-02-24
- maxpl0it/CVE-2019-17026-Exploit47★ · 2020-08-27
ExploitDB entries (1)
Security advisories
- https://www.mozilla.org/security/advisories/mfsa2020-03
- https://www.mozilla.org/security/advisories/mfsa2020-04
- https://security.gentoo.org/glsa/202003-02
- https://usn.ubuntu.com/4335-1
- https://bugzilla.mozilla.org/show_bug.cgi?id=1607443