CVE-2026-67289
CRLF injection in FreeRDP allows HTTP proxy header/request injection via RDP redirection.
Is CVE-2026-67289 being exploited?
Not confirmed. CVE-2026-67289 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.40% probability of exploitation in the next 30 days.
How severe is CVE-2026-67289?
CVE-2026-67289 is rated Critical with a CVSS score of 9.3. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-67289?
Yes. A fix has been recorded for CVE-2026-67289. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-67289 affect?
CVE-2026-67289 affects FreeRDP <= 3.28.0, RDP clients using FreeRDP library, Clients connecting through HTTP proxies. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-67289?
Upgrade FreeRDP to 3.29.0+, restrict/untrusted RDP servers and limit proxy exposure.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Malicious RDP server can inject CRLF/control chars into proxy CONNECT/Host, enabling arbitrary header injection, request smuggling, or proxy access to internal resources.
Immediate action required
- affected< 3.29.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.