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.
Published: 2026-10-17
Score: 6.3 Medium
EPSS: n/a
KEV: No
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Remediation

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History

Sat, 17 Oct 2026 19:00:00 +0000

Type Values Removed Values Added
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.
Title Coder before 2.34.7 IP Spoofing via X-Forwarded-For Header
First Time appeared Coder
Coder coder
Weaknesses CWE-348
CPEs cpe:2.3:a:coder:coder:*:*:*:*:*:*:*:*
Vendors & Products Coder
Coder coder
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N'}

cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N'}

Subscriptions

Coder Coder
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-17T18:46:44.142Z

Reserved: 2026-10-17T12:20:52.372Z

Link: CVE-2026-111934

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-17T19:16:36.497

Modified: 2026-10-17T19:16:36.497

Link: CVE-2026-111934

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-17T21:15:15Z

Weaknesses
  • CWE-348

    Use of Less Trusted Source