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TI-2026-10757 Aliases CVE-2026-12539GHSA-x6hr-f96v-hhgg

Docker Sandboxes ICMP egress restriction bypass after daemon restart

Priority LOW 22CWE-665Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Docker Sandboxes (sbx) blocks ICMP egress with an authorizer applied only at network-creation time, and does not re-apply it to networks rebuilt from disk when the Docker daemon restarts, so a restart-surviving sandbox forwards ICMP to arbitrary hosts. A workload inside a sandbox, which the threat model treats as untrusted, can therefore defeat the documented ICMP egress block to perform network reconnaissance and exfiltrate data over an ICMP covert channel, regardless of the configured allowlist.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0014 3rd percentileScored 2026-11-07
Fix Fixed Docker Sandboxes (Docker): 0.33.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
DockerDocker Sandboxes0.14.0 to before 0.33.00.33.0Patch availableCNA
  • Docker Sandboxes VendorDocker Affected 0.14.0 to before 0.33.0 Fixed in 0.33.0 Patch available CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:docker:docker_sandboxes:*:*:*:*:*:*:*:*——Docker
  • cpe:2.3:a:docker:docker_sandboxes:*:*:*:*:*:*:*:* Versions — — ·Docker

Remediation

  • Fix · CNA Docker Sandboxes (Docker) Fixed in 0.33.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Docker Sandboxes 0.33.0

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-10377 Docker Sandboxes network egress allowlist bypass via unfiltered DNS resolutionPriority LOW 24
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-12539
  2. 2026-10-03 Alias added: GHSA-x6hr-f96v-hhgg

References

Other 2

  • TI-2019-11833 Docker Desktop Community Edition before 2.1.0.1 allows local users to gain privileges by… KEVCVSS 3.1HIGH 7.8
  • TI-2019-04061 runc through 1.0-rc6, as used in Docker before 18.09.2 and other products, allows… CVSS 3.1HIGH 8.6
  • TI-2025-08316 Docker Desktop allows unauthenticated access to Docker Engine API from containers CVSS 4.0CRITICAL 9.3
  • TI-2025-02823 Elevation of Privilege in Docker Desktop for Windows during Upgrade due to Insecure Directory Deletion CVSS 4.0HIGH 7.3
  • TI-2026-14229 Tar extraction in moby/go-archive can write outside the destination directory via link following CVSS 4.0HIGH 7.1
  • TI-2023-21271 Docker Machine through 0.16.2 allows an attacker, who has control of a worker node, to… CVSS 3.1MEDIUM 6.5
See all 132 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences