CVE-2026-111934 Coder before 2.34.7 IP Spoofing via X-Forwarded-For Header
Attackers can spoof IP addresses to bypass rate limits and falsify audit logs in Coder, enabling brute-force attacks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-111934?
CVE-2026-111934 is a medium-severity vulnerability in coder, published on 17 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Coder before 2.34.7 contains an IP spoofing vulnerability in the ExtractRealIPAddress middleware that trusts the leftmost, client-supplied X-Forwarded-For value instead of the client IP appended by a reverse proxy. Attackers can send forged X-Forwarded-For values through appending proxies to bypass per-IP rate limits on login, one-time passcode, and password validation endpoints, enabling brute-force attacks, and to falsify IP addresses recorded in audit logs.
Weakness: CWE-348
Which versions are affected by CVE-2026-111934?
How do I fix CVE-2026-111934?
No fix has been published for CVE-2026-111934 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-111934 being exploited?
There is no known exploitation of CVE-2026-111934 in the wild and no public exploit code.
Sources
Also known as GHSA-vprw-xcrv-287h, GHSA-wxhj-4mx9-pqgf.