GHSA-chh6-ppwq-jh92: github.com/etcd-io/etcd (CVE-2020-15113)

Package	Ecosystem	Affected	Fixed in
github.com/etcd-io/etcd	Go	>=3.4.0-rc.0, <3.4.10 \|\| <3.3.23	3.4.10, 3.3.23

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

etcd (Go package github.com/etcd-io/etcd) versions before 3.3.23 and from 3.4.0-rc.0 before 3.4.10 are affected. When etcd creates its data directory or the directory for self-signed TLS certificates, it uses os.MkdirAll with 700 permissions, but existing directories keep their current permissions without being checked. The source does not describe the attacker's position or the exact impact. Upgrade to 3.3.23 or 3.4.10. As a workaround, make sure these directories have 700 permissions.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
5.7	Medium	3.1	CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0022, the 12th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:15 UTC First seen by agentprime
31 Oct 2026, 14:15 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.