Coder before 2.34.7 IP Spoofing via X-Forwarded-For Header
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.
CVE-2026-111934
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-111934
coder
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "coder",
"product": "coder",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "2.34.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "2.34.7",
"versionType": "semver"
}
],
"packageURL": "pkg:golang/github.com/coder/coder/v2",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-111934
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #38975 · Revision 1
- Added to Heist Feed
- Publisher date