CVE•Published 2026-08-24•Modified 2026-08-31•1 article on news•5 live references•NVD data
CVE-2026-78209
Vulnerability data via NVD (ingested)
CVSS v3.1
8.2
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
EPSS percentile
22
Exploit Prediction Scoring System · top 78% of all CVEs
Description
exceljs through 4.4.0 fails to neutralize leading equals, plus, minus, or at signs in cell values written to CSV output. Attackers who can influence exported cell values can inject formulas that execute when the CSV file is opened in a spreadsheet application, potentially exfiltrating data or performing other malicious actions.
Timeline
Published 2026-08-24
Modified 2026-08-31
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).
More intel sources (5)
Shodan report
vuln:CVE-2026-78209Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-78209Censys host search filtered to this CVE id.
grep.app
CVE-2026-78209Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-78209GitHub code search for direct mentions.
Google dork
"CVE-2026-78209" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-78209 on GitHub.