GHSA-fh74-hm69-rqjw: github.com/opencontainers/runc (CVE-2019-19921)

Package	Ecosystem	Affected	Fixed in
github.com/opencontainers/runc	Go	<1.0.0-rc9.0.20200122160610-2fc03cc11c77	1.0.0-rc9.0.20200122160610-2fc03cc11c77

Machine-written summary

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

The Go package github.com/opencontainers/runc is vulnerable before version 1.0.0-rc9.0.20200122160610-2fc03cc11c77, and the fixed version is the same as that value. An attacker who controls a malicious root filesystem and can create containers with custom mounts sharing a volume with another running container could cause runc to misconfigure security labels and fail to mask sensitive /proc paths. Upgrade runc to the fixed version; the advisory notes the fix is a hot-fix with known workarounds, so review which users can configure container mounts.

Written 6 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
5.9	Medium	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:U/RC:U	GitHub Advisory Database

CISA KEV Not listed.
EPSS 0.0043, the 37th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:44 UTC First seen by agentprime
31 Oct 2026, 14:44 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.