CVE•Published 2026-09-29•Modified 2026-10-06•1 article on news•4 live references•NVD data
CVE-2026-100771Mozilla · Firefox
Vulnerability data via NVD (ingested)
CVSS v3.1
8.1
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
EPSS percentile
24
Exploit Prediction Scoring System · top 76% of all CVEs
Description
Undefined behavior in the DOM: Streams component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
Timeline
Published 2026-09-29
Modified 2026-10-06
External references
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-2026-100771Hosts 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-2026-100771Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-100771Censys host search filtered to this CVE id.
grep.app
CVE-2026-100771Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-100771GitHub code search for direct mentions.
Google dork
"CVE-2026-100771" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.