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CVE-2026-18171VulnerabilityPublished

Docker Sandboxes (sbx) applies the read-only intent of a runtime host mount to the in-guest container bind only: the

Source GCVE Database

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Authoritative record:CVE-2026-18171· Medium 5.7

Not known to be exploited · CVSS 5.7 Medium.

Data as of 10 Nov 2026, 23:24 UTC

CVSS 4.0 base score
5.7Medium
How severe the flaw is on the 0–10 CVSS scale.
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:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 12 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
DockerDocker SandboxesAffected
  • >=0.35.0 <=0.38.0
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.

References

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