VDB
CVE-2026-4728
CVE-2026-4728
PUBLISHED
CVSS 6.5 MEDIUM
Spoofing issue in the Privacy: Anti-Tracking component
Reported by mozilla · Published March 24, 2026
Spoofing issue in the Privacy: Anti-Tracking component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| firefox | Chainguard | 149.0-r0 |
| firefox | Wolfi | 149.0-r0 |
| Thunderbird | Mozilla | 149.0, 149, 140.9 |
| firefox | mozilla | 149.0, 149 |
| Firefox ESR | Mozilla | 140.9, 115.34 |
Risk scores
CVSS 3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | 149 |
| Mozilla | Thunderbird | 149 |
| Mozilla | Firefox | 149 |
| Mozilla | Thunderbird | 149 |
| chainguard | firefox | 0 |
| wolfi | firefox | 0 |
Timeline
- Mar 24, 2026 CVE Published
- Mar 24, 2026 PoC Published (4 in total, the first dated here)
- Mar 25, 2026 EPSS Score (30 in total, the first dated here)
- Mar 25, 2026 Coalition ESS Score (3 in total, the first dated here)
- Apr 13, 2026 CVE Updated
- Jun 2, 2026 Security Advisory (30 in total, the first dated here)
- Aug 11, 2026 Distribution Patch (25 in total, the first dated here)
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2026-4728
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curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
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