CVE-2026-62985— request-filtering-agent: Synchronous throw from createConnection() for literal private-IP hosts bypasses req.on('error'), crashing the Node.js process
Quick assessment
Affected
azu request-filtering-agent
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
request-filtering-agent is an http(s).Agent implementation that blocks requests to Private/Reserved IP addresses. Prior to 3.2.1, RequestFilteringHttpAgent and RequestFilteringHttpsAgent synchronously threw from createConnection when rejecting a literal privat
Affected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| azu | request-filtering-agent | < 3.2.1 |
affected |
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I. Basic Information for CVE-2026-62985
Vulnerability Information
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Vulnerability Title
request-filtering-agent: Synchronous throw from createConnection() for literal private-IP hosts bypasses req.on('error'), crashing the Node.js process
Source: CVE Program / CVE List V5
Vulnerability Description
request-filtering-agent is an http(s).Agent implementation that blocks requests to Private/Reserved IP addresses. Prior to 3.2.1, RequestFilteringHttpAgent and RequestFilteringHttpsAgent synchronously threw from createConnection when rejecting a literal private-IP host such as 169.254.169.254 or 127.0.0.1. Because Node.js http.request and http.get expect connection failures to be delivered asynchronously, the throw bypassed req.on('error') and became an uncaught exception that could terminate the application process. Hostnames resolved through the asynchronous lookup path were not affected by this error-delivery asymmetry. This issue is fixed in version 3.2.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未捕获的异常
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| azu | request-filtering-agent | < 3.2.1 | - |
|
II. Public POCs for CVE-2026-62985
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-62985 (3)
-
https://github.com/azu/request-filtering-agent/releases/tag/v3.2.1 x_refsource_MISC
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V. Comments for CVE-2026-62985
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