{"id":"CVE-2026-100836","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.","aliases":["GHSA-3ccm-4qq2-5wrp","GO-2026-5864"],"modified":"2026-09-29T03:31:04.022829125Z","published":"2026-09-27T01:29:58.070Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-129"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100836.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100836.json"},{"type":"ADVISORY","url":"https://github.com/edgelesssys/contrast/security/advisories/GHSA-3ccm-4qq2-5wrp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100836"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/edgeless-systems-contrast-through-1.20.0-denial-of-service-via-ciphertextcontainer"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/edgelesssys/contrast","events":[{"introduced":"0"},{"fixed":"8f32af3e8d3ed928ea3e85079fd7ec621f9e1dca"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"1.20.0"},{"fixed":"1.20.0"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100836.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"}]}