{"action":"Upgrade ca.uhn.hapi.fhir:org.hl7.fhir.r5 to 6.9.12 or later.","affected":[{"fixed":"6.9.12","introduced":"0"}],"component":"ca.uhn.hapi.fhir:org.hl7.fhir.r5","cve_ids":["CVE-2026-81876"],"ecosystem":"Maven","epss":0.0063,"exploited":false,"fixed_versions":["6.9.12"],"ghsa_id":"GHSA-gq9c-wmrm-5hvr","id":"tcs_01M5N8YQE477126R86SC432QDD","modified_at":"2026-09-17T20:45:06.995458659Z","published_at":"2026-09-17T20:32:21Z","references":["https://osv.dev/vulnerability/GHSA-gq9c-wmrm-5hvr","https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-gq9c-wmrm-5hvr","https://nvd.nist.gov/vuln/detail/CVE-2026-81876","https://github.com/hapifhir/org.hl7.fhir.core/pull/2493","https://github.com/hapifhir/org.hl7.fhir.core/commit/d804558bd77372b1629e55a5b901cad3f5134cdc","https://github.com/hapifhir/org.hl7.fhir.core/commit/edd5d8c139e669e39270785f08be7b63aefef24c","https://github.com/hapifhir/org.hl7.fhir.core"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GHSA-gq9c-wmrm-5hvr","url":"https://osv.dev/vulnerability/GHSA-gq9c-wmrm-5hvr"}],"summary":"HAPI FHIR: SHCParser DEFLATE infinite loop causes denial of service"}