CVE-2026-109245— FreeRDP 3.0.0 before 3.32.0 Improper Certificate Validation in freerdp_http_request
Quick assessment
Affected
FreeRDP FreeRDP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
FreeRDP 3.0.0 至 3.32.0 版本之间存在一个不正确的证书验证漏洞，该漏洞位于 libfreerdp/utils/http.c 中的 freerdp_http_request() 函数。此漏洞允许在完成 TLS 握手时不验证服务器证书链。路径中间人攻击者可以利用此漏洞，在 Azure AD 认证流程中冒充 login.microsoftonline.com，从而捕获 OAuth 授权码并篡改 OpenID 发现文档。
Possible ATT&CK Techniques 3 AI
T1557 · Adversary-in-the-Middle T1078 · Valid Accounts T1095 · Non-Application Layer Protocol
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I. Basic Information for CVE-2026-109245
Vulnerability Information
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Vulnerability Title
FreeRDP 3.0.0 before 3.32.0 Improper Certificate Validation in freerdp_http_request
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-109245
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-109245 (2)
Same Patch Batch · FreeRDP · 2026-10-12 · 18 CVEs total
| CVE-2026-109242 | 7.1 HIGH | FreeRDP before 3.0.0 and 3.6.0 before 3.32.0 Uninitialized Heap Disclosure via Progressive |
| CVE-2026-109255 | 6.8 MEDIUM | FreeRDP 3.0.0 before 3.32.0 heap buffer overflow via license_check_stream_length |
| CVE-2026-109244 | 6.6 MEDIUM | FreeRDP 2.0.0 before 3.32.0 Insecure Private Key Permissions in winpr-makecert |
| CVE-2026-109250 | 6.6 MEDIUM | FreeRDP 3.0.0 before 3.32.0 Heap Buffer Overflow via PKCS#11 collect_keys() |
| CVE-2026-109248 | 6.5 MEDIUM | FreeRDP 3.0.0 before 3.32.0 Heap Out-of-Bounds Read via WinPR Clipboard cFileName |
| CVE-2026-109246 | 6.5 MEDIUM | FreeRDP before 3.32.0 Shadow Server Divide-by-Zero via Frame Acknowledge PDU |
| CVE-2026-109257 | 5.9 MEDIUM | FreeRDP before 3.32.0 Double Free via NSCodec plane growth failure |
| CVE-2026-109254 | 5.9 MEDIUM | FreeRDP 2.1.0 before 3.32.0 Use-After-Free via rdpsnd Disconnect Path |
| CVE-2026-109249 | 5.5 MEDIUM | FreeRDP 3.0.0 before 3.32.0 Heap Out-of-Bounds Read via Remote Assistance File Parsing |
| CVE-2026-109253 | 5.3 MEDIUM | FreeRDP 3.9.0 before 3.32.0 RDPEAR NDR Scalar Out-of-Bounds Read |
| CVE-2026-109251 | 5.3 MEDIUM | FreeRDP before 3.32.0 Out-of-Bounds Write via MS-RDPEGT Video Geometry |
| CVE-2026-109252 | 5.3 MEDIUM | FreeRDP from 3.9.0 before 3.32.0 RDPEAR NULL Pointer Dereference via KERB_RPC_INTERNAL_NAM |
| CVE-2026-109256 | 5.3 MEDIUM | FreeRDP 3.10.0 through 3.32.2 Heap Buffer Overflow in WinPR PNG Conversion |
| CVE-2026-109243 | 4.4 MEDIUM | FreeRDP 3.0.0 before 3.32.0 Insecure Permissions on Soft-Smartcard Private Key File |
| CVE-2026-109240 | 3.1 LOW | FreeRDP 3.11.0 before 3.32.1 Reachable Assertion DoS via urb_isoch_transfer |
| CVE-2026-109241 | 3.1 LOW | FreeRDP before 3.32.0 NULL Dereference in Video Redirection Channel |
| CVE-2026-109247 | 3.1 LOW | FreeRDP before 3.32.0 Path Traversal via Clipboard cFileName |
IV. Related Vulnerabilities
Same product: FreeRDP
-
CVE-2026-109257
FreeRDP before 3.32.0 Double Free via NSCodec plane growth f -
CVE-2026-109256
FreeRDP 3.10.0 through 3.32.2 Heap Buffer Overflow in WinPR -
CVE-2026-109255
FreeRDP 3.0.0 before 3.32.0 heap buffer overflow via license -
CVE-2026-109254
FreeRDP 2.1.0 before 3.32.0 Use-After-Free via rdpsnd Discon -
CVE-2026-109253
FreeRDP 3.9.0 before 3.32.0 RDPEAR NDR Scalar Out-of-Bounds
Same vendor: FreeRDP
-
CVE-2026-109257
FreeRDP before 3.32.0 Double Free via NSCodec plane growth f -
CVE-2026-109256
FreeRDP 3.10.0 through 3.32.2 Heap Buffer Overflow in WinPR -
CVE-2026-109255
FreeRDP 3.0.0 before 3.32.0 heap buffer overflow via license -
CVE-2026-109253
FreeRDP 3.9.0 before 3.32.0 RDPEAR NDR Scalar Out-of-Bounds -
CVE-2026-109254
FreeRDP 2.1.0 before 3.32.0 Use-After-Free via rdpsnd Discon
Same weakness: CWE-295
-
CVE-2026-84418
DataStage on Cloud Pak for Data Improper Certificate Validat -
CVE-2026-109423
NetEase Cloud Music TLS Certificate Validation Bypass -
CVE-2026-103503
Hex trusts its bundled CA certificates when cacerts_path is -
CVE-2026-109399
SWUpdate through 2026.05.1 CMS Signature Verification Bypass -
CVE-2026-103502
hex_core's default HTTP adapter doesn't verify TLS certifica
V. Comments for CVE-2026-109245
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