The caddy-geo-ip (aka GeoIP) middleware through 0.6.0 for Caddy 2, when trust_header…
Priority LOW 30CWE-290Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-290.
Summary
The caddy-geo-ip (aka GeoIP) middleware through 0.6.0 for Caddy 2, when trust_header X-Forwarded-For is used, allows attackers to spoof their source IP address via an X-Forwarded-For header, which may bypass a protection mechanism (trusted_proxy directive in reverse_proxy or IP address range restrictions).
Why it matters now
EPSS 0.00655 51st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | github.com/shift72/caddy-geo-ip (Go) | up to 0.6.0 | — | No fix listed | GHSA-rxg9-hgq7-8pwx |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- github.com/shift72/caddy-geo-ip (Go) Vendor— Affected up to 0.6.0 Fixed in — No fix listed GHSA-rxg9-hgq7-8pwx
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:caddyserver:caddy:*:*:*:*:*:*:*:* | up to 0.6.0 | Vulnerable | caddyserver |
- cpe:2.3:a:caddyserver:caddy:*:*:*:*:*:*:*:* Versions up to 0.6.0 Vulnerable ·caddyserver
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-50463
- 2026-10-03 Alias added: GHSA-rxg9-hgq7-8pwx
- 2026-10-13 EPSS moved to the 50th–90th percentile
References
More caddyserver Caddy vulnerabilities
- TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
- TI-2026-21978 Improper input validation in caddyserver caddy CVSS 4.0HIGH 8.9
- TI-2026-21974 Caddy's mTLS client authentication silently fails open when CA certificate file is missing or malformed CVSS 4.0HIGH 8.8
- TI-2026-23680 Improper authentication in caddyserver caddy CVSS 3.1HIGH 8.8
- TI-2026-21976 Caddy: MatchHost becomes case-sensitive for large host lists (>100), enabling host-based route/auth bypass CVSS 4.0HIGH 7.7
- TI-2026-21975 Caddy: MatchPath %xx (escaped-path) branch skips case normalization, enabling path-based route/auth bypass CVSS 4.0HIGH 7.7
Sources
- CVE-2023-50463 · CVE Program
- CVE-2023-50463 · NVD
- FIRST EPSS
- GHSA-rxg9-hgq7-8pwx · GitHub Advisory Database · CC BY 4.0
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