Vulnerability in Freerdp
CVE-2026-109245
FreeRDP 3.0.0 before 3.32.0 contains an improper certificate validation vulnerability in freerdp_http_request() in libfreerdp/utils/http.c that completes TLS handshakes without verifying the server certificate chain. On-path attackers can impersonate login.microsoftonline.com in the Azure AD authentication flow to capture OAuth authorization codes and substitute the OpenID discovery document.
Vulnerability class: Improper Certificate Validation
Published .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/FreeRDP/FreeRDP/security/advisories/GHSA-h44v-39x6-9xvg (vendor-advisory)
- www.vulncheck.com/advisories/freerdp-3.0.0-before-3.32.0-improper-certificate-v… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109245?
- CVE-2026-109245 is a medium-severity vulnerability in Freerdp, classified under Improper Certificate Validation. CVSS score: 6.8/10. Published 2026-10-12.
- How severe is CVE-2026-109245?
- Medium severity. CVSS v3 base score is 6.8 out of 10.