Read the docs
TI-2019-07202 Aliases CVE-2019-9816GHSA-w463-rqrr-mc27

Type confusion in Mozilla Thunderbird

Priority LOW 36CWE-843Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat.

Summary

A possible vulnerability exists where type confusion can occur when manipulating JavaScript objects in object groups, allowing for the bypassing of security checks within these groups. *Note: this vulnerability has only been demonstrated with UnboxedObjects, which are disabled by default on all supported releases.*. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.

Why it matters now

EPSS 0.06151 93rd percentileScored 2026-11-07
Fix Fixed Thunderbird (Mozilla): 60.7Firefox (Mozilla): 67+1 more productRed Hat: 3 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaThunderbirdbefore 60.760.7Patch availableCNA
MozillaFirefoxbefore 6767Patch availableCNA
MozillaFirefox ESRbefore 60.760.7Patch availableCNA
  • Thunderbird VendorMozilla Affected before 60.7 Fixed in 60.7 Patch available CNA
  • Firefox VendorMozilla Affected before 67 Fixed in 67 Patch available CNA
  • Firefox ESR VendorMozilla Affected before 60.7 Fixed in 60.7 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 67.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*before 60.7VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 60.7VulnerableMozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 67.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 60.7 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 60.7 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Thunderbird (Mozilla) Fixed in 60.7
  • Fix · CNA Firefox (Mozilla) Fixed in 67
  • Fix · CNA Firefox ESR (Mozilla) Fixed in 60.7

Red Hat 3 advisories

  • RHSA-2019:1269 Released 2019-05-23 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 8) firefox-60.7.0-1.el8_0
  • RHSA-2019:1267 Released 2019-05-23 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux Desktop (v. 6) firefox-60.7.0-1.el6_10
    • Red Hat Enterprise Linux Desktop Optional (v. 6) firefox-60.7.0-1.el6_10
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox-60.7.0-1.el6_10
    • Red Hat Enterprise Linux Server (v. 6) firefox-60.7.0-1.el6_10
    • Red Hat Enterprise Linux Server Optional (v. 6) firefox-60.7.0-1.el6_10
    • Red Hat Enterprise Linux Workstation (v. 6) firefox-60.7.0-1.el6_10
    • Red Hat Enterprise Linux Workstation Optional (v. 6) firefox-60.7.0-1.el6_10
  • RHSA-2019:1265 Released 2019-05-23 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux Client (v. 7) firefox-60.7.0-1.el7_6
    • Red Hat Enterprise Linux Client Optional (v. 7) firefox-60.7.0-1.el7_6
    • Red Hat Enterprise Linux Server (v. 7) firefox-60.7.0-1.el7_6
    • Red Hat Enterprise Linux Server Optional (v. 7) firefox-60.7.0-1.el7_6
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-60.7.0-1.el7_6
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-60.7.0-1.el7_6
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) firefox-60.7.0-1.el7_6

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Mozilla Firefox 67

    20 records Highest priority Priority MEDIUM 7 MEDIUM, 13 LOW

    Other records, highest priority first

    • TI-2019-08754 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 47
    • TI-2019-07186 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 46
    • TI-2019-08753 Use after free in Mozilla ThunderbirdPriority MEDIUM 45
    Show all 20 records →
  • Release ·

    Mozilla Firefox ESR, Thunderbird 60.7

    12 records Highest priority Priority MEDIUM 6 MEDIUM, 6 LOW

    Other records, highest priority first

    • TI-2019-08754 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 47
    • TI-2019-07186 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 46
    • TI-2019-08753 Use after free in Mozilla ThunderbirdPriority MEDIUM 45
    Show all 12 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2019:1269
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2019:1265
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2019:1265
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2019:1267
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2019:1267
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2019:1267
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2019:1267
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2019:1265
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2019:1267
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2019:1265
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2019:1267
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2019:1265
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2019:1267
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2019:1265
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2019:1265
Not affected: 3 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-9816
  2. 2026-10-03 Alias added: GHSA-w463-rqrr-mc27

References

Advisory 3

Other 1

  • TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
  • TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
  • TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
See all 3444 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences