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Fencer Vulns
critical 9.8

CVE-2026-67289 json

FreeRDP before 3.29.0 HTTP Proxy Request Injection via Redirection

published 2026-08-01 3 mo ago modified 2026-10-02 37 d ago also EUVD-2026-51840

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits
0
none known

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 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.

Patch / fix

  • FreeRDP FreeRDP 3.29.0
  • freerdp3 Debian 14 3.29.0+dfsg-1

debian advisories DEBIAN-CVE-2026-67289

  • freerdp3 Ubuntu 24.04 LTS 3.30.0+dfsg-0ubuntu0.24.04.1
  • freerdp3 Ubuntu 26.04 LTS 3.30.0+dfsg-0ubuntu0.26.04.1

ubuntu advisories UBUNTU-CVE-2026-67289

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • freerdp RHEL 9 2:2.11.7-7.el9_8.5
  • libwinpr RHEL 9 2:2.11.7-7.el9_8.5
  • freerdp-libs RHEL 9 2:2.11.7-7.el9_8.5
  • freerdp RHEL 10.2 2:3.10.3-12.el10_2.8
  • libwinpr RHEL 10.2 2:3.10.3-12.el10_2.8
  • freerdp-libs RHEL 10.2 2:3.10.3-12.el10_2.8
  • freerdp-server RHEL 10.2 2:3.10.3-12.el10_2.8
  • freerdp RHEL 8 2:2.11.7-11.el8_10

red hat advisories RHSA-2026:62401RHSA-2026:61250RHSA-2026:61251RHSA-2026:60173RHSA-2026:58713RHSA-2026:58712

  • freerdp AlmaLinux 8 2:2.11.7-11.el8_10
  • libwinpr AlmaLinux 8 2:2.11.7-11.el8_10
  • freerdp-libs AlmaLinux 8 2:2.11.7-11.el8_10
  • freerdp AlmaLinux 10 2:3.10.3-12.el10_2.8
  • libwinpr AlmaLinux 10 2:3.10.3-12.el10_2.8
  • freerdp-libs AlmaLinux 10 2:3.10.3-12.el10_2.8
  • freerdp-server AlmaLinux 10 2:3.10.3-12.el10_2.8
  • freerdp AlmaLinux 9 2:2.11.7-7.el9_8.5

almalinux advisories ALSA-2026:54485ALSA-2026:54486ALSA-2026:54487

  • freerdp Rocky Linux 9 2:2.11.7-7.el9_8.5
  • freerdp Rocky Linux 8 2:2.11.7-11.el8_10
  • freerdp Rocky Linux 10 2:3.10.3-12.el10_2.8

rocky linux advisories RLSA-2026:54487RLSA-2026:54485RLSA-2026:54486

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-67289 updated cvss 5.0

FreeRDP: FreeRDP: HTTP Proxy Request Injection via Redirection

  • Red Hat Enterprise Linux 6 freerdp, freerdp-libs, freerdp-plugins
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat CodeReady Linux Builder EUS (v.9.6) freerdp-devel 2.11.7-1.el9_6.12, libwinpr-devel 2.11.7-1.el9_6.12, freerdp-debuginfo 2.11.7-1.el9_6.12, libwinpr-debuginfo 2.11.7-1.el9_6.12, freerdp-debugsource 2.11.7-1.el9_6.12, freerdp-libs-debuginfo 2.11.7-1.el9_6.12
    fixed: vendor fix RHSA-2026:58713
  • Red Hat Enterprise Linux AppStream (v. 8) freerdp 2.11.7-11.el8_10, libwinpr 2.11.7-11.el8_10, freerdp-libs 2.11.7-11.el8_10
    fixed: vendor fix RHSA-2026:54485
  • Red Hat Enterprise Linux AppStream (v. 9) freerdp 2.11.7-7.el9_8.5, libwinpr 2.11.7-7.el9_8.5, freerdp-libs 2.11.7-7.el9_8.5
    fixed: vendor fix RHSA-2026:54487
  • Red Hat Enterprise Linux AppStream (v. 10) freerdp 3.10.3-12.el10_2.8, libwinpr 3.10.3-12.el10_2.8, freerdp-libs 3.10.3-12.el10_2.8
    fixed: vendor fix RHSA-2026:54486
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) freerdp 2.2.0-14.el8_4.2, libwinpr 2.2.0-14.el8_4.2, freerdp-libs 2.2.0-14.el8_4.2
    fixed: vendor fix RHSA-2026:60173
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) freerdp 2.2.0-7.el8_6.11, libwinpr 2.2.0-7.el8_6.11, freerdp-libs 2.2.0-7.el8_6.11
    fixed: vendor fix RHSA-2026:61250
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) freerdp 2.2.0-12.el8_8.10, libwinpr 2.2.0-12.el8_8.10, freerdp-libs 2.2.0-12.el8_8.10
    fixed: vendor fix RHSA-2026:61251
show 12 more
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) freerdp 2.4.1-6.el9_2.11, libwinpr 2.4.1-6.el9_2.11, freerdp-libs 2.4.1-6.el9_2.11
    fixed: vendor fix RHSA-2026:58712
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) freerdp 2.11.2-1.el9_4.10, libwinpr 2.11.2-1.el9_4.10, freerdp-libs 2.11.2-1.el9_4.10
    fixed: vendor fix RHSA-2026:58710
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) freerdp 3.10.3-3.el10_0.11, libwinpr 3.10.3-3.el10_0.11, freerdp-libs 3.10.3-3.el10_0.11
    fixed: vendor fix RHSA-2026:58711
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) freerdp 2.11.7-1.el9_6.12, libwinpr 2.11.7-1.el9_6.12, freerdp-libs 2.11.7-1.el9_6.12
    fixed: vendor fix RHSA-2026:58713
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) freerdp 2.2.0-14.el8_4.2, libwinpr 2.2.0-14.el8_4.2, freerdp-libs 2.2.0-14.el8_4.2
    fixed: vendor fix RHSA-2026:60173
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) freerdp 2.2.0-7.el8_6.11, libwinpr 2.2.0-7.el8_6.11, freerdp-libs 2.2.0-7.el8_6.11
    fixed: vendor fix RHSA-2026:61250
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) freerdp 2.2.0-12.el8_8.10, libwinpr 2.2.0-12.el8_8.10, freerdp-libs 2.2.0-12.el8_8.10
    fixed: vendor fix RHSA-2026:61251
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) freerdp-devel 2.11.7-7.el9_8.5, libwinpr-devel 2.11.7-7.el9_8.5, freerdp-debuginfo 2.11.7-7.el9_8.5, libwinpr-debuginfo 2.11.7-7.el9_8.5, freerdp-debugsource 2.11.7-7.el9_8.5, freerdp-libs-debuginfo 2.11.7-7.el9_8.5
    fixed: vendor fix RHSA-2026:54487
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) freerdp-server 3.10.3-12.el10_2.8
    fixed: vendor fix RHSA-2026:54486
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) freerdp-server 3.10.3-3.el10_0.11
    fixed: vendor fix RHSA-2026:58711
  • Red Hat Enterprise Linux CRB (v. 8) freerdp-devel 2.11.7-11.el8_10, freerdp-debuginfo 2.11.7-11.el8_10, libwinpr-debuginfo 2.11.7-11.el8_10, freerdp-debugsource 2.11.7-11.el8_10, freerdp-libs-debuginfo 2.11.7-11.el8_10
    fixed: vendor fix RHSA-2026:54485
  • Red Hat Enterprise Linux Server (v. 7 ELS) freerdp 2.1.1-5.el7_9.11, libwinpr 2.1.1-5.el7_9.11, freerdp-libs 2.1.1-5.el7_9.11 Red Hat Enterprise Linux Server Optional (v. 7 ELS) freerdp-devel 2.1.1-5.el7_9.11, libwinpr-devel 2.1.1-5.el7_9.11, freerdp-debuginfo 2.1.1-5.el7_9.11
    fixed: vendor fix RHSA-2026:62401

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
3 mo ago

Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mwwh-mhp9-q7vm referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 9.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 4.0 9.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

  • FreeRDP FreeRDP

Classification

Weakness
  • CWE-113 Improper Neutralization of CRLF Sequences in HTTP Headers

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.