{"id":"CVE-2026-93315","aliases":["BELL-CVE-2026-93315","EUVD-2026-92819","GHSA-2f5p-x9ph-g97x","UBUNTU-CVE-2026-93315"],"status":"published","title":"BuildKit proxy CA cleanup can be disrupted by build steps","description":"When proxy networking with CA injection is enabled, a build can modify its CA bundle before cleanup. This may cause cleanup to block, operate outside the build rootfs, or fail without failing the build.","severity":{"version":"4.0","score":5.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:L/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00096,"percentile":0.00687,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-367"],"published":"2026-10-05T21:57:08Z","modified":"2026-10-28T02:30:37Z","fixes":[{"ecosystem":"Alpaquita:stream","package":"docker","fixed_in":["29.9.0-r0"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpaquita:stream","package":"docker","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"24.0.2-r0"},{"fixed":"29.9.0-r0"}]}]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"docker.io","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.2~dfsg1-1ubuntu4","1.10.2-0ubuntu3","1.10.2-0ubuntu4","1.10.3-0ubuntu1","1.10.3-0ubuntu4","1.10.3-0ubuntu5","1.10.3-0ubuntu6","1.11.2-0ubuntu5~16.04","1.12.1-0ubuntu13~16.04.1","1.12.3-0ubuntu4~16.04.2","1.12.6-0ubuntu1~16.04.1","1.13.1-0ubuntu1~16.04.2","17.03.2-0ubuntu2~16.04.1","18.06.1-0ubuntu1~16.04.2","18.06.1-0ubuntu1.2~16.04.1","18.09.2-0ubuntu1~16.04.1","18.09.5-0ubuntu1~16.04.2","18.09.7-0ubuntu1~16.04.1","18.09.7-0ubuntu1~16.04.4","18.09.7-0ubuntu1~16.04.5","18.09.7-0ubuntu1~16.04.6","18.09.7-0ubuntu1~16.04.7","18.09.7-0ubuntu1~16.04.9+esm1","18.09.7-0ubuntu1~16.04.9+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"docker.io","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.13.1-0ubuntu6","17.03.2-0ubuntu1","17.03.2-0ubuntu3","17.03.2-0ubuntu5","17.12.1-0ubuntu1","18.06.1-0ubuntu1~18.04.1","18.06.1-0ubuntu1.2~18.04.1","18.09.2-0ubuntu1~18.04.1","18.09.5-0ubuntu1~18.04.2","18.09.7-0ubuntu1~18.04.1","18.09.7-0ubuntu1~18.04.3","18.09.7-0ubuntu1~18.04.4","19.03.6-0ubuntu1~18.04.1","19.03.6-0ubuntu1~18.04.2","19.03.6-0ubuntu1~18.04.3","20.10.2-0ubuntu1~18.04.2","20.10.2-0ubuntu1~18.04.3","20.10.7-0ubuntu1~18.04.1","20.10.7-0ubuntu1~18.04.2","20.10.7-0ubuntu5~18.04.2","20.10.7-0ubuntu5~18.04.3","20.10.12-0ubuntu2~18.04.1","20.10.21-0ubuntu1~18.04.2","20.10.21-0ubuntu1~18.04.3","20.10.21-0ubuntu1~18.04.3+esm1","20.10.21-0ubuntu1~18.04.3+esm2","20.10.21-0ubuntu1~18.04.3+esm3"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"docker.io","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["19.03.2-0ubuntu1","19.03.6-0ubuntu1","19.03.8-0ubuntu1","19.03.8-0ubuntu1.20.04","19.03.8-0ubuntu1.20.04.1","19.03.8-0ubuntu1.20.04.2","20.10.2-0ubuntu1~20.04.2","20.10.2-0ubuntu1~20.04.3","20.10.7-0ubuntu1~20.04.1","20.10.7-0ubuntu1~20.04.2","20.10.7-0ubuntu5~20.04.1","20.10.7-0ubuntu5~20.04.2","20.10.12-0ubuntu2~20.04.1","20.10.21-0ubuntu1~20.04.1","20.10.21-0ubuntu1~20.04.2","20.10.21-0ubuntu1~20.04.4","20.10.21-0ubuntu1~20.04.5","20.10.21-0ubuntu1~20.04.6","20.10.21-0ubuntu1~20.04.6+esm1","20.10.21-0ubuntu1~20.04.6+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"docker.io-app","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["20.10.25-0ubuntu1~20.04.1","20.10.25-0ubuntu1~20.04.2","24.0.5-0ubuntu1~20.04.1","24.0.7-0ubuntu2~20.04.1","26.1.3-0ubuntu1~20.04.1","26.1.3-0ubuntu1~20.04.1+esm1","26.1.3-0ubuntu1~20.04.1+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"docker.io","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["20.10.7-0ubuntu5","20.10.7-0ubuntu7","20.10.12-0ubuntu1","20.10.12-0ubuntu2","20.10.12-0ubuntu3","20.10.12-0ubuntu3+gke1.24.1","20.10.12-0ubuntu4","20.10.21-0ubuntu1~22.04.2","20.10.21-0ubuntu1~22.04.3","20.10.21-0ubuntu1~22.04.5","20.10.21-0ubuntu1~22.04.6","20.10.21-0ubuntu1~22.04.7","20.10.21-0ubuntu1~22.04.7+esm1","20.10.21-0ubuntu1~22.04.7+esm2","20.10.21-0ubuntu1~22.04.8","20.10.21-0ubuntu1~22.04.8+esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"docker.io-app","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["20.10.25-0ubuntu1~22.04.1","20.10.25-0ubuntu1~22.04.2","24.0.5-0ubuntu1~22.04.1","24.0.7-0ubuntu2~22.04.1","26.1.3-0ubuntu1~22.04.1","26.1.3-0ubuntu1~22.04.1+esm1","27.5.1-0ubuntu3~22.04.1","27.5.1-0ubuntu3~22.04.2","28.2.2-0ubuntu1~22.04.1","29.1.3-0ubuntu3~22.04.1","29.1.3-0ubuntu3~22.04.2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"docker.io","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["20.10.24+dfsg1-1ubuntu2","20.10.25+dfsg1-2ubuntu1","20.10.25+dfsg1-2ubuntu1+esm1","20.10.25+dfsg1-2ubuntu1+esm2","20.10.25+dfsg1-2ubuntu1.24.04.1","20.10.25+dfsg1-2ubuntu1.24.04.1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"docker.io-app","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["24.0.5-0ubuntu1","24.0.7-0ubuntu1","24.0.7-0ubuntu2","24.0.7-0ubuntu3","24.0.7-0ubuntu4","24.0.7-0ubuntu4.1","26.1.3-0ubuntu1~24.04.1","26.1.3-0ubuntu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proxy CA cleanup can be disrupted by build steps","description":"When proxy networking with CA injection is enabled, a build can modify its CA bundle before cleanup. This may cause cleanup to block, operate outside the build rootfs, or fail without failing the build.","status":"published","published":"2026-10-05T21:57:08.053Z","modified":"2026-10-06T13:27:23.994Z","cvss":[{"version":"4.0","score":5.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:L/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T14:19:54.122945Z"}],"euvd":[{"id":"EUVD-2026-92819","description":"When proxy networking with CA injection is enabled, a build can modify its CA bundle before cleanup. This may cause cleanup to block, operate outside the build rootfs, or fail without failing the build.","status":"published","published":"2026-10-05T21:57:08Z","modified":"2026-10-06T13:27:23Z","cvss":[{"version":"4.0","score":5.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:L/SA:N","level":"medium"}],"updated_at":"2026-11-02T17:27:37.923108Z"}],"nvd":[{"id":"CVE-2026-93315","description":"When proxy networking with CA injection is enabled, a build can modify its CA bundle before cleanup. This may cause cleanup to block, operate outside the build rootfs, or fail without failing the build.","status":"published","published":"2026-10-05T22:16:58.82Z","modified":"2026-10-06T15:08:38.397Z","cvss":[{"version":"4.0","score":5.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T14:12:54.129949Z"}],"osv":[{"id":"CVE-2026-93315","title":"BuildKit proxy CA cleanup can be disrupted by build steps","description":"When proxy networking with CA injection is enabled, a build can modify its CA bundle before cleanup. This may cause cleanup to block, operate outside the build rootfs, or fail without failing the build.","status":"published","published":"2026-10-05T21:57:08.053Z","modified":"2026-10-28T02:30:37.101960227Z","cvss":[{"version":"4.0","score":5.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:L/SA:N","level":"medium"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T15:45:20.931171Z"},{"id":"UBUNTU-CVE-2026-93315","description":"When proxy networking with CA injection is enabled, a build can modify its CA bundle before cleanup. This may cause cleanup to block, operate outside the build rootfs, or fail without failing the build.","status":"published","published":"2026-10-05T22:16:00Z","modified":"2026-10-17T13:01:17.825196739Z","cvss":[{"version":"4.0","score":5.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:L/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:57:44.071534Z"},{"id":"BELL-CVE-2026-93315","status":"published","published":"2026-10-09T06:09:18.820834Z","modified":"2026-10-21T07:15:09.777554307Z","updated_at":"2026-11-02T15:28:27.164451Z"}]}}