CVE•Published 2026-08-12•Modified 2026-08-26•1 article on news•4 live references•NVD data
CVE-2026-18391
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
45
Exploit Prediction Scoring System · top 55% of all CVEs
Weaknesses (CWE)
Description
The WooCommerce Subscriptions WordPress plugin before 9.1.0 does not validate user input before unserializing it on stores with High-Performance Order Storage enabled, leading to a PHP Object Injection issue which unauthenticated users can escalate to Remote Code Execution via a gadget chain present in the bundled dependencies.
Timeline
Published 2026-08-12
Modified 2026-08-26
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-2026-18391Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-18391Censys host search filtered to this CVE id.
grep.app
CVE-2026-18391Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-18391GitHub code search for direct mentions.
Google dork
"CVE-2026-18391" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (2)
CVE-2026-183912 repos
1dayexploit/1day-archivePython
Technical deep-dives and root cause analyses of recently disclosed CVEs - reverse engineering patches, building proof-of-concepts, and documenting exploitation techniques in the 1-…
Yem-Tech/Nessus-Based-Risk-Assessmentunknown
Nessus Essentials vulnerability scan and CVSS v2.0 risk assessment of www.halisans.com — covering risk identification, scoring, heat map analysis, and treatment recommendations.