Skip to main content
HIGH

CVE-2022-1529

CVSS v3

8.8

HIGH

EPSS Score

17.1 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Get an alert for each new CVE published for Mozilla.

Set up CVE WatchFree account · no credit card

Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • firefoxAlmaLinux:8all versions · fixed in 91.9.1-1.el8_6.almaand 1 other package

Vendor advisories

  • CVE-2022-1529 Red Hat Product Security190 products fixed · 4 known affected

    Mozilla: Untrusted input used in JavaScript object indexing, leading to prototype pollution

    firefox as a component of Red Hat Enterprise Linux 6 · firefox.src as a component of Red Hat Enterprise Linux 6 · thunderbird as a component of Red Hat Enterprise Linux 6

  • RHSA-2022:4776 Red Hat Product Security13 products fixed

    Red Hat Security Advisory: firefox security update

  • RHSA-2022:4769 Red Hat Product Security13 products fixed

    Red Hat Security Advisory: thunderbird security update

  • RHSA-2022:4765 Red Hat Product Security13 products fixed

    Red Hat Security Advisory: firefox security update

  • RHSA-2022:4768 Red Hat Product Security13 products fixed

    Red Hat Security Advisory: firefox security update

  • RHSA-2022:4772 Red Hat Product Security13 products fixed

    Red Hat Security Advisory: thunderbird security update

7 more advisories

Full record on NVD

Description

An attacker could have sent a message to the parent process where the contents were used to double-index into a JavaScript object, leading to prototype pollution and ultimately attacker-controlled JavaScript executing in the privileged parent process. This vulnerability affects Firefox ESR < 91.9.1, Firefox < 100.0.2, Firefox for Android < 100.3.0, and Thunderbird < 91.9.1.

Technical details

Published
2022-12-22

Frequently asked questions

What is CVE-2022-1529?

An attacker could have sent a message to the parent process where the contents were used to double-index into a JavaScript object, leading to prototype pollution and ultimately attacker-controlled JavaScript executing in the privileged parent process. This vulnerability affects Firefox ESR < 91.9.1, Firefox < 100.0.2, Firefox for Android < 100.3.0, and Thunderbird < 91.9.1.

Is CVE-2022-1529 actively exploited?

Active exploitation of CVE-2022-1529 has not been confirmed. Its EPSS score was 17.1% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-1529?

CVE-2022-1529 has a CVSS v3 base score of 8.8 (HIGH severity).

Running Mozilla? Hear about its next vulnerability

CVE Watch matches each new CVE to the vendors and products you list (vendor and product, not the version) and puts it in your alerts with its KEV and EPSS status.

Get alerts for this productCISA KEV additions, October 2026Search CVEs

Already have an account? Open CVE WatchNo credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database