CVE-2026-105216

go-micro before 6.0.0 contains an improper certificate validation vulnerability that allows network attackers to impersonate services because the shared TLS helper sets InsecureSkipVerify to true by default. Man-in-the-middle attackers can present any certificate to intercept or modify gRPC transport, HTTP and RabbitMQ broker, and Consul or etcd registry traffic, including authentication tokens and credentials.

CVSS 4.0

9.1CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

7.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS

0.2% chance of exploitation in the next 30 days; higher than 9% of CVEs (scores of 2026-10-25)

CWE

CWE-295

Published

2026-10-04

Modified

2026-10-06

Record from

the NVD, synced 2026-10-19

References

• https://github.com/micro/go-micro
• https://github.com/micro/go-micro/blob/v5.30.0/internal/util/tls/tls.go#L43-L67
• https://github.com/micro/go-micro/commit/c7657f73f45cf839e643db10f28703eeab7299c3
• https://github.com/micro/go-micro/issues/2963
• https://www.vulncheck.com/advisories/go-micro-before-6.0.0-disabled-tls-certificate-verification-via-tls-config-helper

Check your stackJSON