{"id":"CVE-2026-15791","summary":"LLB file operation can be tricked to remove /tmp directory contents","details":"A crafted message in the BuildKit low-level build API can be used to remove the contents of the /tmp directory. The action that can normally be used to delete files inside the build container rootfs can escape into the real host temp directory.","aliases":["GHSA-32pv-7hq5-qhwq"],"modified":"2026-08-12T03:51:37.230427599Z","published":"2026-07-21T16:10:20.881Z","database_specific":{"cna_assigner":"Docker","cwe_ids":["CWE-22"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/15xxx/CVE-2026-15791.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/15xxx/CVE-2026-15791.json"},{"type":"ADVISORY","url":"https://github.com/moby/buildkit/security/advisories/GHSA-32pv-7hq5-qhwq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-15791"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/moby/buildkit","events":[{"introduced":"068cf686a7e5c3254244d0acc54636f4f393611e"},{"fixed":"e42e1bfd389af7203238cce77b1f7dad447285e9"}],"database_specific":{"extracted_events":[{"introduced":"0.10.0"},{"fixed":"0.31.2"},{"introduced":"0"}],"source":["AFFECTED_FIELD","CPE_RANGE"],"cpe":"cpe:2.3:a:mobyproject:buildkit:*:*:*:*:*:*:*:*"}}],"versions":["v0.31.1","v0.31.0","dockerfile/1.25.0-labs","dockerfile/1.25.0","v0.31.0-rc2","dockerfile/1.25.0-rc2-labs","dockerfile/1.25.0-rc2","v0.31.0-rc1","dockerfile/1.25.0-rc1-labs","dockerfile/1.25.0-rc1","v0.30.0-rc2","v0.30.0-rc1","dockerfile/1.24.0-rc1-labs","dockerfile/1.24.0-rc1","v0.29.0","dockerfile/1.23.0-labs","dockerfile/1.23.0","v0.29.0-rc1","dockerfile/1.23.0-rc1-labs","dockerfile/1.23.0-rc1","v0.28.0-rc2","dockerfile/1.22.0-rc2-labs","dockerfile/1.22.0-rc2","v0.28.0-rc1","dockerfile/1.22.0-rc1-labs","dockerfile/1.22.0-rc1","v0.27.0-rc2","v0.27.0-rc1","dockerfile/1.21.0-rc1-labs","dockerfile/1.21.0-rc1","v0.26.0-rc2","v0.26.0","dockerfile/1.20.0-labs","dockerfile/1.20.0","v0.26.0-rc1","dockerfile/1.20.0-rc1-labs","dockerfile/1.20.0-rc1","v0.25.0-rc1","dockerfile/1.19.0-rc1-labs","dockerfile/1.19.0-rc1","v0.24.0-rc2","dockerfile/1.18.0-rc2-labs","dockerfile/1.18.0-rc2","v0.24.0-rc1","dockerfile/1.18.0-rc1-labs","dockerfile/1.18.0-rc1","v0.22.0-rc1","dockerfile/1.16.0-rc1-labs","dockerfile/1.16.0-rc1","v0.23.0-rc1","dockerfile/1.17.0-rc1-labs","dockerfile/1.17.0-rc1","v0.21.0-rc1","dockerfile/1.15.0-rc1-labs","dockerfile/1.15.0-rc1","v0.20.0-rc2","dockerfile/1.14.0-rc2-labs","dockerfile/1.14.0-rc2","v0.20.0-rc1","dockerfile/1.14.0-rc1-labs","dockerfile/1.14.0-rc1","v0.19.0-rc3","v0.19.0-rc2","dockerfile/1.13.0-rc1-labs","dockerfile/1.13.0-rc1","v0.19.0-rc1","v0.18.0-rc2","v0.18.0","dockerfile/1.12.0-labs","dockerfile/1.12.0","v0.18.0-rc1","dockerfile/1.12.0-rc1-labs","dockerfile/1.12.0-rc1","v0.17.0","dockerfile/1.11.0-labs","dockerfile/1.11.0","v0.17.0-rc1","dockerfile/1.11.0-rc1-labs","dockerfile/1.11.0-rc1","v0.17.0-rc2","dockerfile/1.11.0-rc2-labs","dockerfile/1.11.0-rc2","v0.16.0-rc2","v0.16.0-rc1","dockerfile/1.10.0-rc1-labs","dockerfile/1.10.0-rc1","v0.15.0-rc2","v0.15.0","dockerfile/1.9.0-rc2-labs","dockerfile/1.9.0-rc2","dockerfile/1.9.0-labs","dockerfile/1.9.0","v0.15.0-rc1","dockerfile/1.9.0-rc1-labs","dockerfile/1.9.0-rc1","v0.13.0-beta2","v0.14.0","dockerfile/1.8.0-labs","dockerfile/1.8.0","v0.14.0-rc2","dockerfile/1.8.0-rc2-labs","dockerfile/1.8.0-rc2","v0.14.0-rc1","dockerfile/1.8.0-rc1-labs","dockerfile/1.8.0-rc1","v0.13.0-rc3","v0.13.0-rc2","dockerfile/1.7.0-rc1-labs","dockerfile/1.7.0-rc1","v0.13.0-rc1","v0.13.0-beta3","v0.13.0-beta1","v0.12.0","dockerfile/1.6.0-labs","dockerfile/1.6.0","v0.12.0-rc2","dockerfile/1.6.0-rc2-labs","dockerfile/1.6.0-rc2","v0.12.0-rc1","dockerfile/1.6.0-rc1-labs","dockerfile/1.6.0-rc1","v0.11.0-rc3","v0.11.0-rc2","dockerfile/1.5.0-rc2-labs","dockerfile/1.5.0-rc2","v0.11.0-rc1","dockerfile/1.5.0-rc1-labs","dockerfile/1.5.0-rc1","v0.10.0","dockerfile/1.4.0-labs","dockerfile/1.4.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-15791.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N"}]}