{"id":"CVE-2026-100833","summary":"Contrast before 1.23.1 Image Substitution via Policy Generation","details":"Contrast (edgelesssys/contrast) versions 1.14.0 before 1.23.1 generate runtime policies that fail to detect all container image substitutions. A bad rebase during a Kata Containers update accidentally introduced an `allow_storage` rule that accepts storage entries using the `image_guest_pull` driver without verifying the image digest. An attacker with access to the Kata agent API — for example, a Kubernetes cluster administrator in Contrast's threat model — can therefore substitute a container image with an exploit payload, provided the substituted image satisfies the remaining policy rules, undermining the confidential container's integrity guarantees.","aliases":["GHSA-m2qg-wrxv-h898"],"modified":"2026-09-29T03:30:54.941089112Z","published":"2026-09-27T01:28:32.099Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-20"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100833.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100833.json"},{"type":"ADVISORY","url":"https://github.com/edgelesssys/contrast/security/advisories/GHSA-m2qg-wrxv-h898"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100833"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/contrast-before-1.23.1-image-substitution-via-policy-generation"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/edgelesssys/contrast","events":[{"introduced":"b5b8c31d6673559df2881902882f89e7ec87ca62"},{"fixed":"1c6f2bbec66007f1fed56b64a5b06a4e617409e2"}],"database_specific":{"source":["AFFECTED_FIELD","DESCRIPTION"],"extracted_events":[{"introduced":"1.14.0"},{"fixed":"1.23.1"}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100833.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"}]}