Medium · CVSS 6.3CVE-2026-111934

Coder before 2.34.7 IP Spoofing via X-Forwarded-For HeaderCVE-2026-111934

Answer in brief

CVE-2026-111934 records a Medium severity (CVSS 6.3) vulnerability in Coder before 2.34.7 IP Spoofing via X-Forwarded-For Header. The current sources do not mark it as known exploited. The current feed maps coder/coder (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 17, 2026Updated Oct 17, 2026Source checked Oct 17, 2026First seen by HOL Oct 17, 2026Material review Oct 17, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 6.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps coder/coder (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
coder/codergeneric	>=0 <2.34.7	2.34.7

Recommended response

Check inventory. Check lockfiles and deployed manifests for coder/coder.
Review the reported fix. Update coder/coder to 2.34.7 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 17, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.