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CVE•Published 2026-05-19•Modified 2026-05-20•0 articles on news•5 live references•NVD data

CVE-2026-8960Mozilla · Firefox

Vulnerability data via NVD (ingested)

CVSS v3.1
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS percentile
—
Weaknesses (CWE)
CWE-290Authentication Bypass by Spoofing
Description

Spoofing issue in WebExtensions. This vulnerability was fixed in Firefox 151 and Thunderbird 151.

Timeline
Published 2026-05-19
Modified 2026-05-20

External references

NVDMITREExploit-DBSploitusVulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts
vuln:CVE-2026-8960
Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Mozilla Firefox"
All exposed Mozilla Firefox instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Firefox"
HTTP body or banner mentions "Firefox" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-8960
Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-8960
Censys host search filtered to this CVE id.
grep.app
CVE-2026-8960
Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-8960
GitHub code search for direct mentions.
Google dork
"CVE-2026-8960" exploit -site:nvd.nist.gov
Write-ups and news, NVD excluded.

Known PoCs on GitHub

No public proof-of-concept repositories found for CVE-2026-8960 on GitHub.
We haven't classified any articles referencing CVE-2026-8960 yet. The external references above still apply.