CVE•Published 2026-07-21•Modified 2026-07-24•1 article on news•5 live references•NVD data
CVE-2026-16383Mozilla · Firefox
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
6
Exploit Prediction Scoring System · top 94% of all CVEs
Weaknesses (CWE)
Description
Mitigation bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.
Timeline
Published 2026-07-21
Modified 2026-07-24
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-2026-16383Hosts 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-2026-16383Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-16383Censys host search filtered to this CVE id.
grep.app
CVE-2026-16383Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-16383GitHub code search for direct mentions.
Google dork
"CVE-2026-16383" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (6)
CVE-2026-163836 repos
Teradata/python-driverunknown
Teradata SQL Driver for Python
jdrains110-beep/Triumph-Synergy-Digital-Financial-EcosystemTypeScript
Quantum Financial System (QFS) built on Pi Network - Quantum-resistant cryptography (Kyber/Dilithium), Supabase RLS + Realtime, Pi SDK 2.0 payments, Fast-Track KYC/KYB, PiRC Protoc…
dolphlabs/slangC
A statically typed language for server-side and network programming. spawn is M:N — green tasks on a worker pool, not a thread per connection. Accept, recv, and send park. Memory i…
xingxingzaixian/docker_scrapy_redis_python3.6Dockerfile
scrapy+redis集群+python3.6
openziti-test-kitchen/ziggy-fodderPython
A small repo for scripts and utils used by OpenZiggy
jaschadub/compromised-packages-checkPython
Scan a repository for known-malicious npm, cratres, and PyPI package versions from recent supply-chain compromises (Mini Shai-Hulud, TanStack, @cap-js/mbt, etc). UPDATED 6 TIMES A …