CVE-2026-110835

FreeRDP 3.0.0 before 3.32.0 allows HTTP header injection in its proxy because a lone LF in the target portion of a routing token (Cookie: msts=) is not rejected and is written by http_proxy_connect into the CONNECT request line and Host header. A remote unauthenticated RDP client connecting to a proxy using FixedTarget=false and an upstream HTTP proxy can alter HTTP request/header framing at that upstream proxy.

CVSS 4.0

6.3CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N

CVSS 3.1

5.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 17% of CVEs (scores of 2026-10-25)

CWE

CWE-93

Published

2026-10-14

Modified

2026-10-23

Record from

the NVD, synced 2026-10-24

Affected

• freerdp:freerdp

References

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-87v8-2gwr-ww9j
• https://www.vulncheck.com/advisories/freerdp-3.0.0-before-3.32.0-http-header-injection-via-proxy-routing-token
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-87v8-2gwr-ww9j

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