Malicious websites could have tricked users into accepting launching a program to handle an external URL protocol. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5.
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Score 6.5 from GitHub Security Advisory published 2022-12-22. NVD baseline CVSS 6.5; sources differ by 0.0.
A fix is available — apply it.
Malicious websites could have tricked users into accepting launching a program to handle an external URL protocol. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5.
December 22, 2022
April 16, 2025
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | firefox-locale-ast (96.0+build2-0ubuntu0.21.10.1) @ impish | 2026-05-25 | ubuntu |
| ubuntu | thunderbird-locale-id (1:91.5.0+build1-0ubuntu0.21.10.1) @ impish | 2026-05-25 | ubuntu |
| ubuntu | thunderbird-locale-id (1:91.5.0+build1-0ubuntu0.20.04.1) @ focal | 2026-05-25 | ubuntu |
| redhat | firefox-0:91.5.0-1.el8_2 | 2022-01-12 | redhat |
| redhat | firefox-0:91.5.0-1.el8_4 | 2022-01-12 | redhat |
| redhat | thunderbird-0:91.5.0-1.el8_4 | 2022-01-12 | redhat |
| redhat | firefox-0:91.5.0-1.el7_9 | 2022-01-12 | redhat |
| redhat | thunderbird-0:91.5.0-1.el7_9 | 2022-01-12 | redhat |
| redhat | thunderbird-0:91.5.0-1.el8_5 | 2022-01-12 | redhat |
| redhat | firefox-0:91.5.0-1.el8_5 | 2022-01-12 | redhat |
| redhat | thunderbird-0:91.5.0-1.el8_1 | 2022-01-12 | redhat |
| redhat | firefox-0:91.5.0-1.el8_1 | 2022-01-12 | redhat |
| redhat | thunderbird-0:91.5.0-1.el8_2 | 2022-01-12 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
RHSA-2022:0123 — Low
RHSA-2022:0125 — Low
RHSA-2022:0126 — Low
RHSA-2022:0128 — Low
RHSA-2022:0129 — Low
RHSA-2022:0130 — Low
RHSA-2022:0131 — Low
RHSA-2022:0132 — Low
Firefox vulnerabilities
Thunderbird vulnerabilities
Thunderbird vulnerabilities
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
Explore the affected products and dependency analysis for CVE-2022-22739
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