Docker Sandboxes (sbx) applies the read-only intent of a runtime host mount to the in-guest container bind only: the
Source GCVE Database
Not known to be exploited · CVSS 5.7 Medium.
Data as of 10 Nov 2026, 23:24 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 12 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| DockerDocker Sandboxes | Affected
| Fixed in– |
AI-suggested
Operators should be aware of this limitation in Docker Sandboxes' handling of read-only mounts and consider restricting unprivileged code execution within sandboxes or applying additional host-level access controls. Monitor vendor advisories for updates or patches addressing this issue.
Description
CVE-2026-18171 is a medium severity vulnerability in Docker Sandboxes (sbx) where the read-only intent of a runtime host mount is only applied to the in-guest container bind. The underlying virtio-fs host-edge grant remains writable at the shared-export path, allowing unprivileged code inside the sandbox to write to a host directory that was intended to be read-only.