CVE•Published 2026-05-29•Modified 2026-07-21•1 article on news•4 live references•NVD data
CVE-2026-44237Sangoma · Freepbx
Vulnerability data via NVD (ingested)
CVSS v3.1
8.1
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS percentile
10
Exploit Prediction Scoring System · top 90% of all CVEs
Weaknesses (CWE)
Description
FreePBX is an open source IP PBX. Prior to 17.0.8, the FreePBX api module's OAuth2 implementation does not sufficiently validate client credentials during token issuance. Knowledge of a valid client_id is required. The validateClient() method in ClientRepository.php unconditionally returns true, allowing any party with knowledge of a valid client_id to obtain OAuth2 access tokens without providing the correct client_secret. This vulnerability is fixed in 17.0.8.
Timeline
Published 2026-05-29
Modified 2026-07-21
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-2026-44237Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Sangoma Freepbx"All exposed Sangoma Freepbx instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Freepbx"HTTP body or banner mentions "Freepbx" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-44237Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-44237Censys host search filtered to this CVE id.
grep.app
CVE-2026-44237Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-44237GitHub code search for direct mentions.
Google dork
"CVE-2026-44237" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.