CVE-2026-55602
Last modified
CVE-2026-55602 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. http-proxy-middleware is node.js http-proxy middleware. From 0.16.0 until 2.0.10, 3.0.6, and 4.1.0, http-proxy-middleware documents router proxy-table entries as host, path, or host+path selectors, but the host+path implementation uses unanchored substring matching on attacker-controlled request metadata. EPSS estimates a 0.40% chance of exploitation in the next 30 days.
Description
http-proxy-middleware is node.js http-proxy middleware. From 0.16.0 until 2.0.10, 3.0.6, and 4.1.0, http-proxy-middleware documents router proxy-table entries as host, path, or host+path selectors, but the host+path implementation uses unanchored substring matching on attacker-controlled request metadata. As a result, a crafted Host header that is only a superstring match for a configured host+path key can still route a request to an unintended backend. This vulnerability is fixed in 2.0.10, 3.0.6, and 4.1.0.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Chimurai | Http-Proxy-Middleware | >= 0.16.0, < 2.0.10 |
| Chimurai | Http-Proxy-Middleware | >= 3.0.0, < 3.0.6 |
| Chimurai | Http-Proxy-Middleware | >= 4.0.0, < 4.1.0 |
References
- https://github.com/chimurai/http-proxy-middleware/security/advisories/GHSA-64mm-vxmg-q3vjExploit, Vendor Advisory
- https://github.com/chimurai/http-proxy-middleware/security/advisories/GHSA-64mm-vxmg-q3vjExploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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How Strix Helps
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