Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2019-11707

CVE-2019-11707HIGH

Mozilla Firefox and Thunderbird

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   R  U  H  H  H    8.8   .3770   98.5   YES

AFFECTED
  Product      Versions       Fixed
  Firefox ESR  unspecified –  —
  Firefox      unspecified –  —
  Thunderbird  unspecified –  —

TIMELINE
  May 3   Reserved by mozilla
  Jul 23  Published (CNA: mozilla)
  May 23  Added to CISA KEV, remediation due 2022-06-13

CWE-843 · CNA: mozilla · CVSS v3.1 · 5 references · KEV due June 13, 2022

Description

A type confusion vulnerability can occur when manipulating JavaScript objects due to issues in Array.pop. This can allow for an exploitable crash. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Firefox ESR < 60.7.1, Firefox < 67.0.3, and Thunderbird < 60.7.2.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
May 3, 2019	Reserved	Reserved by mozilla
July 23, 2019	Published	Published (CNA: mozilla)
May 23, 2022	KEV ADDED	Added to CISA KEV, remediation due 2022-06-13

Affected

Affected products and packages — 3 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Mozilla	Firefox ESR	—	unspecified	—
Mozilla	Firefox	—	unspecified	—
Mozilla	Thunderbird	—	unspecified	—

Weaknesses

CWE-843

References (5)

https://bugzilla.mozilla.org/show_bug.cgi?id=1544386 [x_refsource_MISC]
https://security.gentoo.org/glsa/201908-12 [vendor-advisory, x_refsource_GENTOO]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-11707 [government-resource]
https://www.mozilla.org/security/advisories/mfsa2019-18/ [x_refsource_MISC]
https://www.mozilla.org/security/advisories/mfsa2019-20/ [x_refsource_MISC]

Authoritative record: CVE-2019-11707 at cve.org

Vendors: mozilla

Weaknesses: CWE-843

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2019-11707 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.