CVE-2020-37056
Crystal Shard http-protection 0.2.0 - IP Spoofing Bypass
- State
- Published
- Severity
- 6.9 Medium
- Published
- Jan 30, 2026
- Updated
- Jul 28, 2026
- Reserved
- Jan 28, 2026
Description
Crystal Shard http-protection 0.2.0 contains an IP spoofing vulnerability that allows attackers to bypass protection middleware by manipulating request headers. Attackers can hardcode consistent IP values across X-Forwarded-For, X-Client-IP, and X-Real-IP headers to circumvent security checks and gain unauthorized access.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-290 Authentication Bypass by Spoofing
Affected Products
| Product | Versions |
|---|---|
http-protectionCrystal Shard |
|
References
- ExploitDB-48533exploit
- HTTP Protection Crystal Shard Repositoryproduct
- VulnCheck Advisory: Crystal Shard http-protection 0.2.0 - IP Spoofing Bypassthird-party-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.