{"id":"EUVD-2026-101107","revision":null,"records":[{"revision":"a982fabd658f40f5bcb0cdaa4e4146da","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-73802","aliases":[],"title":"Gitea Runner host isolation bypass through container options","description":"Gitea Runner passes workflow-controlled container options into Docker job container configuration while privileged mode is disabled. Host namespace settings, expanded capabilities, and security profile overrides can remain effective despite Privileged being forced false. A workflow author able to run jobs on an affected Docker-backed runner can use these options to access host namespaces and execute commands as root on the runner host, bypassing the intended container isolation.","state":0,"publishedAt":"2026-10-14T14:37:55.141+00:00","modifiedAt":"2026-10-18T13:34:49.826+00:00","affected":[{"ecosystem":"Vendor product","name":"gitea.com/gitea/runner","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Gitea\",\n                    \"product\": \"Gitea Runner\",\n                    \"packageName\": \"gitea.com/gitea/runner\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"lessThan\": \"3.0.0\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://github.com/go-gitea/gitea/security/advisories/GHSA-x4q3-gcj3-m6cf","https://blog.gitea.com/release-of-runner-3.0.0/","https://gitea.com/gitea/runner/releases/tag/v3.0.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-73802","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-73802","identifiers":["CVE-2026-73802"]},"retained":false,"historicalAffected":[]},{"revision":"5ee8b080a32f4bea9e16a12e0587dd3b","observedAt":"2026-11-07T14:27:05.523+00:00","statement":{"source":"euvd","id":"EUVD-2026-101107","aliases":["CVE-2026-73802","GHSA-x4q3-gcj3-m6cf"],"title":"Gitea Runner passes workflow-controlled container options into Docker job container configuration while privileged mode is disabled. Host namespace settings, expanded capabilities, and security profile overrides can remain effective despite…","description":"Gitea Runner passes workflow-controlled container options into Docker job container configuration while privileged mode is disabled. Host namespace settings, expanded capabilities, and security profile overrides can remain effective despite Privileged being forced false. A workflow author able to run jobs on an affected Docker-backed runner can use these options to access host namespaces and execute commands as root on the runner host, bypassing the intended container isolation.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8,"severity":null}],"references":["https://github.com/go-gitea/gitea/security/advisories/GHSA-x4q3-gcj3-m6cf","https://blog.gitea.com/release-of-runner-3.0.0/","https://gitea.com/gitea/runner/releases/tag/v3.0.0"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-101107","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Oct 14, 2026, 2:37:55 PM","dateUpdated":"Oct 18, 2026, 1:34:49 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-101107","identifiers":["EUVD-2026-101107","CVE-2026-73802","GHSA-x4q3-gcj3-m6cf"]},"retained":false,"historicalAffected":[]},{"revision":"9d6e1680f24341a7a5e17802a0124fc3","observedAt":"2026-10-25T15:19:09.409+00:00","statement":{"source":"nvd","id":"CVE-2026-73802","aliases":[],"title":"Gitea Runner passes workflow-controlled container options into Docker job container configuration while privileged mode is disabled. Host namespace settings, expanded capabilities, and security profile overrides can remain effective despite…","description":"Gitea Runner passes workflow-controlled container options into Docker job container configuration while privileged mode is disabled. Host namespace settings, expanded capabilities, and security profile overrides can remain effective despite Privileged being forced false. A workflow author able to run jobs on an affected Docker-backed runner can use these options to access host namespaces and execute commands as root on the runner host, bypassing the intended container isolation.","state":0,"publishedAt":"2026-10-14T15:17:24.67+00:00","modifiedAt":"2026-10-18T14:16:55.83+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · 134c704f-9b21-4f2e-91b3-4a467353bcc0 · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://blog.gitea.com/release-of-runner-3.0.0/","https://gitea.com/gitea/runner/releases/tag/v3.0.0","https://github.com/go-gitea/gitea/security/advisories/GHSA-x4q3-gcj3-m6cf"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73802","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-269"],"productCriteria":[],"sourceDates":{"published":"2026-10-14T15:17:24.670","lastModified":"2026-10-18T14:16:55.830"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-73802","identifiers":["CVE-2026-73802"]},"retained":false,"historicalAffected":[]},{"revision":"f41724993d0144c4ab251c8caf98723e","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-x4q3-gcj3-m6cf","aliases":["CVE-2026-73802","GO-2026-6656"],"title":"gitea-runner: workflow container.options passes host namespaces and capability flags to job container when privileged mode is disabled","description":"### Summary\nact_runner appends workflow-controlled `jobs.<job>.container.options` directly \nto the Docker HostConfig for the job container. When runner privileged mode is \ndisabled, only `Privileged` is forced false. Host namespace flags, capability \nexpansion, and security profile overrides from workflow YAML are preserved in \nthe final HostConfig. A workflow author can enter host PID/IPC namespaces and \nexecute commands on the runner host as root.\n\n### Details\nSource-to-sink path in act_runner:\n\n- `ContainerSpec.Options` accepts workflow YAML `container.options`\n- `RunContext.options()` appends workflow options to runner-level container options\n- Job container is created with `Privileged: rc.Config.Privileged` but also \n  with `Options: rc.options(ctx)`\n- `mergeContainerConfigs()` parses Docker CLI-style options into HostConfig\n- When privileged mode is disabled, only `copts.privileged` is forced false\n- `sanitizeConfig()` only filters `Binds` and `Mounts`\n- Preserved dangerous HostConfig fields:\n\n```text\nPrivileged=false\nPidMode=host\nIpcMode=host\nCapAdd=[\"ALL\"]\nSecurityOpt=[\"seccomp=unconfined\",\"apparmor=unconfined\"]\n```\n\nAttacker workflow YAML:\n```yaml\njobs:\n  breakout:\n    runs-on: ubuntu-latest\n    container:\n      image: ubuntu:22.04\n      options: >-\n        --pid=host --ipc=host --cap-add=ALL \n        --security-opt seccomp=unconfined \n        --security-opt apparmor=unconfined\n    steps:\n      - name: host namespace marker\n        run: |\n          nsenter -t 1 -m -u -i -n -p -- sh -c \"id > /tmp/marker\"\n```\n\n### Impact\nAn attacker who can submit a workflow to a repository using a shared \nDocker-backed act_runner can:\n\n- Enter host PID, IPC, and mount namespaces\n- Execute arbitrary commands as root on the runner host\n- Access runner host secrets, deployment credentials, and environment variables\n- Pivot to adjacent jobs running on the same runner\n- Access internal build infrastructure reachable from the runner host\n\nCritical severity for shared runners where untrusted users can trigger \nworkflows. High severity for single-tenant runners with privileged mode \nexplicitly disabled as a security control.\n\n### Fix Direction\nTreat `container.options` as untrusted input. Reject or strip when \nprivileged mode is disabled:\n\n- Host namespaces: `--pid=host`, `--ipc=host`, `--uts=host`, `--network=host`\n- Capability expansion: `--cap-add ALL`, `--cap-add SYS_ADMIN`\n- Security overrides: `--security-opt seccomp=unconfined`, `--security-opt apparmor=unconfined`\n- Device access: `--device`, `--device-cgroup-rule`\n- Volume inheritance: `--volumes-from`\n- Runtime controls: `--runtime`, `--cgroup-parent`","state":0,"publishedAt":"2026-10-02T23:18:12+00:00","modifiedAt":"2026-10-07T17:55:44.7953589+00:00","affected":[{"ecosystem":"Go","name":"gitea.com/gitea/runner","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.0.9-0.20260731160927-34bfa1915022"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"CRITICAL"}],"references":["https://github.com/go-gitea/gitea/security/advisories/GHSA-x4q3-gcj3-m6cf","https://gitea.com/gitea/runner/pulls/1058","https://gitea.com/gitea/runner/releases/tag/v3.0.0","https://github.com/go-gitea/gitea"],"sourceUrl":"https://github.com/advisories/GHSA-x4q3-gcj3-m6cf","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-x4q3-gcj3-m6cf","identifiers":["GHSA-x4q3-gcj3-m6cf","CVE-2026-73802","GO-2026-6656"]},"retained":false,"historicalAffected":[]},{"revision":"3df80ec52a7243c59bef56719c0e6280","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-6656","aliases":["CVE-2026-73802","GHSA-x4q3-gcj3-m6cf"],"title":"gitea-runner: workflow container.options passes host namespaces and capability flags to job container when privileged mode is disabled in gitea.com/gitea/runner","description":"gitea-runner: workflow container.options passes host namespaces and capability flags to job container when privileged mode is disabled in gitea.com/gitea/runner","state":0,"publishedAt":"2026-10-07T14:10:14+00:00","modifiedAt":"2026-10-07T17:45:12.474497+00:00","affected":[{"ecosystem":"Go","name":"gitea.com/gitea/runner","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.0.9-0.20260731160927-34bfa1915022"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/go-gitea/gitea/security/advisories/GHSA-x4q3-gcj3-m6cf","https://gitea.com/gitea/runner/pulls/1058","https://gitea.com/gitea/runner/releases/tag/v3.0.0"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-6656","license":"OSV · upstream source license applies","key":"osv:GO-2026-6656","identifiers":["GO-2026-6656","CVE-2026-73802","GHSA-x4q3-gcj3-m6cf"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EPSS backfill.","generation":"2026-11-09T06:02:15.5744295+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-09T06:02:15.5744295+00:00","lastSuccessAt":"2026-11-09T06:02:15.8108397+00:00","error":null,"lastVerifiedAt":"2026-11-09T06:02:15.81084+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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