CVE Explorer
CVE-2026-12039
Docker Sandboxes (sbx) enforces an HTTP/S-only egress allowlist but does not apply it to DNS resolution: the per-network embedded DNS server forwards any queried name to the host resolver whenever the network is internet-connected, without consulting the policy. A workload inside a sandbox, which the threat model treats as untrusted, can therefore encode data into DNS labels for an attacker-controlled domain and exfiltrate it through a DNS covert channel, bypassing the configured allowlist.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"cpes":["cpe:2.3:a:docker:sandboxes:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","platforms":["MacOS","Linux","Windows"],"product":"Docker Sandboxes","vendor":"Docker","versions":[{"lessThan":"0.33.0","status":"affected","version":"0.13.0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:ea1efac6e79fd48e33cdf6934122951230e81ef172f31af915cca2c71f9cddb1 · sha256:ddc2a22829d6c493… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"LOCAL","baseScore":5.7,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact"…
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:ea1efac6e79fd48e33cdf6934122951230e81ef172f31af915cca2c71f9cddb1 · sha256:ddc2a22829d6c493… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-923","description":"CWE-923: Improper Restriction of Communication Channel to Intended Endpoints","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:ea1efac6e79fd48e33cdf6934122951230e81ef172f31af915cca2c71f9cddb1 · sha256:ddc2a22829d6c493… · /containers/cna/problemTypes/0/descriptions/0
Source references
2 source assertions{"tags":["product"],"url":"https://docs.docker.com/ai/sandboxes/"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:ea1efac6e79fd48e33cdf6934122951230e81ef172f31af915cca2c71f9cddb1 · sha256:ddc2a22829d6c493… · /containers/cna/references/0
{"tags":["release-notes"],"url":"https://github.com/docker/sbx-releases/releases/tag/v0.33.0"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:ea1efac6e79fd48e33cdf6934122951230e81ef172f31af915cca2c71f9cddb1 · sha256:ddc2a22829d6c493… · /containers/cna/references/1
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.