{"schema":"threatline.record/2","record":{"id":"CVE-2026-100836","aliases":["GHSA-3ccm-4qq2-5wrp","GO-2026-5864"],"summary":"Edgeless Systems Contrast through 1.20.0 Denial of Service via ciphertextContainer","details":"Contrast through 1.20.0 contains a panic vulnerability in the transit-engine endpoint's ciphertextContainer.UnmarshalJSON function that fails to validate decoded ciphertext length before slicing. An authenticated workload with a valid mesh certificate can trigger a runtime panic by submitting a short base64-encoded ciphertext, causing log spam and request failures without crashing the process.","categories":["Libraries & packages"],"product":"contrast","vendor":"edgelesssys","ecosystem":"Go","affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-100836","source_modified_at":"2026-09-28T16:00:49.167Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"contrast","vendor":"edgelesssys","versions":[{"version":"0","status":"affected","versionType":"semver","lessThanOrEqual":"1.20.0"}],"defaultStatus":"unaffected"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-3ccm-4qq2-5wrp","source_modified_at":"2026-09-27T11:56:00.527174184Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"github.com/edgelesssys/contrast","ecosystem":"Go","purl":"pkg:golang/github.com/edgelesssys/contrast"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.21.0"}]}],"versions":[]}],"fixed_versions":[{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-3ccm-4qq2-5wrp","source_modified_at":"2026-09-27T11:56:00.527174184Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"github.com/edgelesssys/contrast","ecosystem":"Go","purl":"pkg:golang/github.com/edgelesssys/contrast"},"version":"1.21.0"}],"cvss":5.3,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00147,"percentile":0.03586,"score_date":"2026-10-23"},"published_at":"2026-09-27T01:29:58.070Z","modified_at":"2026-09-28T16:00:49.167Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-100836","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-09-28T16:00:49.167Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-3ccm-4qq2-5wrp","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-09-27T11:56:00.527174184Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-100836","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","OSV","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/edgelesssys/contrast/security/advisories/GHSA-3ccm-4qq2-5wrp","tags":["exploit"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/edgeless-systems-contrast-through-1.20.0-denial-of-service-via-ciphertextcontainer","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"no","technical_impact":"partial","assessed_at":"2026-09-28T16:00:31.401784Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"ecosystem","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-09-28T16:00:49.167Z","content_hash":"0b448adfb3b84fad38fd092d8dcb1e4e7a84413f6f63145256d0fc023ca68d1e"}}