CVE•Published 2026-02-24•Modified 2026-09-21•1 article on news•5 live references•NVD data
CVE-2026-2771Mozilla · 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
38
Exploit Prediction Scoring System · top 62% of all CVEs
Weaknesses (CWE)
Description
Undefined behavior in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.
Timeline
Published 2026-02-24
Modified 2026-09-21
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-2026-2771Hosts 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-2026-2771Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-2771Censys host search filtered to this CVE id.
grep.app
CVE-2026-2771Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-2771GitHub code search for direct mentions.
Google dork
"CVE-2026-2771" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (8)
CVE-2026-27718 repos
cclank/Hermes-Wikiunknown
Hermes agent + LLM Wiki + 源代码 完成 Hermes agent wiki
uiuc-kang-lab/cve-benchPython
CVE-Bench: A Benchmark for AI Agents’ Ability to Exploit Real-World Web Application Vulnerabilities
patrickmgarrity/Anthropic-Credited-CVEsunknown
Tracking Vulnerabilities That Appear to be Credited to the Anthropic Research Team
zulloper/cve-pocPython
CVE POC repo 자동 수집기
hiifong/starListPython
Export your star's repository list
maheshndev/awesome-reposHTML
Awesome Repositories - Explore top-rated GitHub repositories curated for developers—tools, libraries, and projects to boost productivity and learning in one place. Discover the bes…
oslook/n8n-workflowsunknown
4200 + Workflow Automation Templates are Grouped by Categories/Services for easy navigation
wawanwidiantara/wpsentryPython
WordPress security audit & exploitation toolkit — fingerprinting, CVE database matching, 60+ active checks (hardening, misconfig, injection, plugin CVEs), exploitation simulation, …