CVE-2019-9793

A mechanism was discovered that removes some bounds checking for string, array, or typed array accesses if Spectre mitigations have been disabled. This vulnerability could allow an attacker to create an arbitrary value in compiled JavaScript, for which the range analysis will infer a fully controlled, incorrect range in circumstances where users have explicitly disabled Spectre mitigations. *Note: Spectre mitigations are currently enabled for all users by default settings.*. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

• CWE-119

• https://access.redhat.com/errata/RHSA-2019:0966
• https://access.redhat.com/errata/RHSA-2019:1144
• https://bugzilla.mozilla.org/show_bug.cgi?id=1528829Issue Tracking, Permissions Required, Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2019-07/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2019-08/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2019-11/Vendor Advisory
• https://access.redhat.com/errata/RHSA-2019:0966
• https://access.redhat.com/errata/RHSA-2019:1144
• https://bugzilla.mozilla.org/show_bug.cgi?id=1528829Issue Tracking, Permissions Required, Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2019-07/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2019-08/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2019-11/Vendor Advisory

Published

Apr 26, 2019

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2019-9787WordPress before 5.1.1 does not properly filter comment cont…
• CVE-2019-9788Mozilla developers and community members reported memory saf…9.8
• CVE-2019-9789Mozilla developers and community members reported memory saf…
• CVE-2019-9790A use-after-free vulnerability can occur when a raw pointer …
• CVE-2019-9791The type inference system allows the compilation of function…9.8
• CVE-2019-9792The IonMonkey just-in-time (JIT) compiler can leak an intern…9.8
• CVE-2019-9794A vulnerability was discovered where specific command line a…
• CVE-2019-9795A vulnerability where type-confusion in the IonMonkey just-i…
• CVE-2019-9796A use-after-free vulnerability can occur when the SMIL anima…
• CVE-2019-9797Cross-origin images can be read in violation of the same-ori…
• CVE-2019-9798On Android systems, Firefox can load a library from APITRACE…
• CVE-2019-9799Insufficient bounds checking of data during inter-process co…