--- id: CVE-2026-67289 title: >- FreeRDP before 3.29.0 (affected versions <= 3.28.0) does not validate CRLF and control characters in the server-controlled RDP redirection TargetNetAddress field summary: >- FreeRDP before 3.29.0 (affected versions <= 3.28.0) does not validate CRLF and control characters in the server-controlled RDP redirection TargetNetAddress field. This value is copied into the client's ServerHostname and, when the client… severity: critical cvss: 9.8 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H' cwe: - CWE-113 - CWE-93 vendor: freerdp product: freerdp affected: - freerdp < 3.29.0 patched: - freerdp 3.29.0 published: '2026-08-01' updated: '2026-10-02' sourceUpdated: '2026-10-02T19:12:56.863' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67289' references: - url: >- https://github.com/FreeRDP/FreeRDP/commit/f3b4347105114fe7453828736bea069999af319f label: disclosure@vulncheck.com - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mwwh-mhp9-q7vm' label: disclosure@vulncheck.com - url: >- https://www.vulncheck.com/advisories/freerdp-before-http-proxy-request-injection-via-redirection label: disclosure@vulncheck.com - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-67289.json - url: 'https://access.redhat.com/security/cve/CVE-2026-67289' - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2510004' - url: 'https://www.cve.org/CVERecord?id=CVE-2026-67289' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67289' - url: 'https://access.redhat.com/errata/RHSA-2026:62401' - url: 'https://access.redhat.com/errata/RHSA-2026:58711' - url: 'https://access.redhat.com/errata/RHSA-2026:54486' - url: 'https://access.redhat.com/errata/RHSA-2026:54485' - url: 'https://access.redhat.com/errata/RHSA-2026:60173' - url: 'https://access.redhat.com/errata/RHSA-2026:61250' - url: 'https://access.redhat.com/errata/RHSA-2026:61251' - url: 'https://access.redhat.com/errata/RHSA-2026:58712' - url: 'https://access.redhat.com/errata/RHSA-2026:58710' - url: 'https://access.redhat.com/errata/RHSA-2026:58713' - url: 'https://access.redhat.com/errata/RHSA-2026:54487' tags: - nvd - csaf - vex - red-hat - score-dispute epss: 0.00428 epssPercentile: 0.36924 ingestedAt: '2026-08-02T05:17:49.412Z' scores: nvd: 9.8 vendor: 5 --- ## Overview FreeRDP before 3.29.0 (affected versions <= 3.28.0) does not validate CRLF and control characters in the server-controlled RDP redirection TargetNetAddress field. This value is copied into the client's ServerHostname and, when the client connects through an HTTP proxy, is written directly into the proxy CONNECT request line and Host header by http_proxy_connect() without filtering. A malicious or compromised RDP server can send a crafted redirection PDU containing embedded control characters to inject arbitrary headers/requests into the HTTP proxy CONNECT request. ## Affected - `freerdp < 3.29.0` ## Remediation Upgrade past the affected range: - `freerdp 3.29.0` ## Vendor advisories - **RHSA-2026:62401** · Red Hat · fixed in: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS) · released 2026-09-02 · [advisory](https://access.redhat.com/errata/RHSA-2026:62401) - **RHSA-2026:58711** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) · released 2026-08-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:58711) - **RHSA-2026:54486** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-08-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:54486) - **RHSA-2026:54485** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-08-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:54485) - **RHSA-2026:60173** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:60173) - **RHSA-2026:61250** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) · released 2026-08-31 · [advisory](https://access.redhat.com/errata/RHSA-2026:61250) - **RHSA-2026:61251** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8) · released 2026-08-31 · [advisory](https://access.redhat.com/errata/RHSA-2026:61251) - **RHSA-2026:58712** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.2) · released 2026-08-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:58712) - **RHSA-2026:58710** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.4) · released 2026-08-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:58710) - **RHSA-2026:58713** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat CodeReady Linux Builder EUS (v.9.6) · released 2026-08-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:58713) - **RHSA-2026:54487** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · released 2026-08-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:54487) - **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 6 · updated 2026-10-02 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-67289.json)