{"id":"CVE-2026-100833","state":"PUBLISHED","title":"Contrast before 1.23.1 Image Substitution via Policy Generation","description":"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.","publishedAt":"2026-09-27T01:28:32.099Z","updatedAt":"2026-10-09T13:22:54.929Z","severity":{"score":8.6,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["edgelesssys contrast"],"affected":[{"vendor":"edgelesssys","product":"contrast","defaultStatus":"unaffected","versions":[{"version":"1.14.0","status":"affected","lessThan":"1.23.1","versionType":"semver"},{"version":"1.23.1","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/edgelesssys/contrast/security/advisories/GHSA-m2qg-wrxv-h898","https://www.vulncheck.com/advisories/contrast-before-1.23.1-image-substitution-via-policy-generation"],"weaknesses":["CWE-20"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/100xxx/CVE-2026-100833.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-100833","state":"PUBLISHED","datePublished":"2026-09-27T01:28:32.099Z","dateUpdated":"2026-10-09T13:22:54.929Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-09-26T23:23:03.410Z"},"containers":{"cna":{"title":"Contrast before 1.23.1 Image Substitution via Policy Generation","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"edgelesssys","product":"contrast","defaultStatus":"unaffected","versions":[{"version":"1.14.0","status":"affected","lessThan":"1.23.1","versionType":"semver"},{"version":"1.23.1","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/edgelesssys/contrast/security/advisories/GHSA-m2qg-wrxv-h898","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-m2qg-wrxv-h898)"},{"url":"https://www.vulncheck.com/advisories/contrast-before-1.23.1-image-substitution-via-policy-generation","name":"VulnCheck Advisory: Contrast before 1.23.1 Image Substitution via Policy Generation","tags":["third-party-advisory"]}],"metrics":[{"cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.6,"baseSeverity":"HIGH","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","exploitMaturity":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS"},{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE","baseScore":9.6,"baseSeverity":"CRITICAL"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","lang":"en","description":"Improper Input Validation","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-10-09T13:22:54.929Z"},"datePublic":"2026-08-24T00:00:00.000Z","credits":[{"lang":"en","value":"sespiros","type":"remediation reviewer"},{"lang":"en","value":"burgerdev","type":"remediation developer"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-28T13:53:22.400645Z","id":"CVE-2026-100833","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-28T13:53:40.534Z"}}]}}}