{"action":"Upgrade github.com/edgelesssys/contrast to 1.21.0 or later.","affected":[{"fixed":"1.21.0","introduced":"0"}],"component":"github.com/edgelesssys/contrast","cve_ids":["CVE-2026-100836"],"ecosystem":"Go","epss":0.00177,"exploited":false,"fixed_versions":["1.21.0"],"ghsa_id":"GHSA-3ccm-4qq2-5wrp","id":"tcs_01M5KGQBF0PZG9GZ8278ZMA50G","modified_at":"2026-09-27T11:56:00.527174184Z","published_at":"2026-07-07T15:26:37Z","references":["https://osv.dev/vulnerability/GO-2026-5864","https://github.com/edgelesssys/contrast/security/advisories/GHSA-3ccm-4qq2-5wrp","https://github.com/edgelesssys/contrast/commit/d6584fbff816037472034f7ad6e08cdbab1d870d","https://github.com/edgelesssys/contrast/releases/tag/v1.21.0"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"GO-2026-5864","url":"https://osv.dev/vulnerability/GO-2026-5864"},{"source":"nvd","source_id":"CVE-2026-100836","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100836"}],"summary":"Constrata's coordinator transit engine `ciphertextContainer.UnmarshalJSON` panics on attacker-controlled short ciphertexts in github.com/edgelesssys/contrast"}