{"cve":"CVE-2026-100836","nvd":{"published":"2026-09-27T02:17:21.797","modified":"2026-09-28T16:17:11.160","status":"Deferred","description":"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.","cvss_v4":{"vector":"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","score":5.3},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","score":4.3},"cwes":["CWE-129"],"references":["https://github.com/edgelesssys/contrast/security/advisories/GHSA-3ccm-4qq2-5wrp","https://www.vulncheck.com/advisories/edgeless-systems-contrast-through-1.20.0-denial-of-service-via-ciphertextcontainer","https://github.com/edgelesssys/contrast/security/advisories/GHSA-3ccm-4qq2-5wrp"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:56:48.555445741+00:00"},"epss":{"cve":"CVE-2026-100836","score":0.00177,"percentile":0.07311,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-3ccm-4qq2-5wrp","url":"https://osv.dev/vulnerability/GHSA-3ccm-4qq2-5wrp","summary":"Constrata's coordinator transit engine `ciphertextContainer.UnmarshalJSON` panics on attacker-controlled short ciphertexts","modified":"2026-09-27T11:56:00.527174184Z","packages":[{"ecosystem":"Go","name":"github.com/edgelesssys/contrast","purl":"pkg:golang/github.com/edgelesssys/contrast","ranges":["<1.21.0"],"fixed":["1.21.0"]}]},{"id":"GO-2026-5864","url":"https://osv.dev/vulnerability/GO-2026-5864","summary":"Constrata's coordinator transit engine `ciphertextContainer.UnmarshalJSON` panics on attacker-controlled short ciphertexts in github.com/edgelesssys/contrast","modified":"2026-09-27T11:56:00.527174184Z","packages":[{"ecosystem":"Go","name":"github.com/edgelesssys/contrast","purl":"pkg:golang/github.com/edgelesssys/contrast","ranges":["<1.21.0"],"fixed":["1.21.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}