If an attacker was able to corrupt the methods of an Array object in JavaScript via prototype pollution, they could have achieved…

Description

If an attacker was able to corrupt the methods of an Array object in JavaScript via prototype pollution, they could have achieved execution of attacker-controlled JavaScript code in a privileged context. This vulnerability affects Firefox ESR < 91.9.1, Firefox < 100.0.2, Firefox for Android < 100.3.0, and Thunderbird < 91.9.1.

Scores

EPSS (exploitation in 30 days)

28.5% · top 1.9% of all CVEs (5 Nov 2026)

CISA SSVC

Exploitation: poc · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.

Weakness

• Prototype pollution in Top-Level Await implementation
• CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (opens in a new tab)All about CWE-1321 and its CVEs

Affected products

• Mozilla · Firefox ESR

  • affected unspecified – < 91.9.1

• Mozilla · Firefox

  • affected unspecified – < 100.0.2

• Mozilla · Firefox for Android

  • affected unspecified – < 100.3.0

• Mozilla · Thunderbird

  • affected unspecified – < 91.9.1

References (2)

• https://www.mozilla.org/security/advisories/mfsa2022-19/ (opens in a new tab)x_transferred
• https://bugzilla.mozilla.org/show_bug.cgi?id=1770137 (opens in a new tab)x_transferredexploit

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-2022-1802](https://trackcve.app/badge/CVE-2022-1802.svg)](https://trackcve.app/cve/CVE-2022-1802)

Record last updated 16 Apr 2025, 15:17 UTC.