A possible vulnerability exists where type confusion can occur when manipulating JavaScript objects in object groups, allowing for the…

Description

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.

Scores

EPSS (exploitation in 30 days)

6.2% · top 6.5% of all CVEs (6 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.

Weakness

• Type confusion with object groups and UnboxedObjects
• CWE-843 (opens in a new tab)All about CWE-843 and its CVEs

Affected products

• Mozilla · Thunderbird

  • affected unspecified – < 60.7

• Mozilla · Firefox

  • affected unspecified – < 67

• Mozilla · Firefox ESR

  • affected unspecified – < 60.7

References (4)

• https://www.mozilla.org/security/advisories/mfsa2019-13/ (opens in a new tab)x_refsource_MISCx_transferred
• https://www.mozilla.org/security/advisories/mfsa2019-15/ (opens in a new tab)x_refsource_MISCx_transferred
• https://www.mozilla.org/security/advisories/mfsa2019-14/ (opens in a new tab)x_refsource_MISCx_transferred
• https://bugzilla.mozilla.org/show_bug.cgi?id=1536768 (opens in a new tab)x_refsource_MISCx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2019-9816](https://trackcve.app/badge/CVE-2019-9816.svg)](https://trackcve.app/cve/CVE-2019-9816)

Record last updated 4 Aug 2024, 22:01 UTC.