CVE Explorer
CVE-2026-55470
HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to 6.9.10, the fix for CVE-2026-45367 incompletely patched the DSTU2 module, leaving FHIRPathEngine.matches() in org.hl7.fhir.dstu2/utils/FHIRPathEngine.java to call raw String.matches(sw) without RegexTimeout protection while replaceMatches() was updated, allowing an unauthenticated attacker to trigger catastrophic regex backtracking and exhaust server CPU. This issue is fixed in versi
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"org.hl7.fhir.core","vendor":"hapifhir","versions":[{"status":"affected","version":"< 6.9.10"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:98cbb660bdc3d61642257595235132f35cd524796bdd7447050a93570a3da132 · sha256:49b2b3bc83ba6eba… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:98cbb660bdc3d61642257595235132f35cd524796bdd7447050a93570a3da132 · sha256:49b2b3bc83ba6eba… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-1333","description":"CWE-1333: Inefficient Regular Expression Complexity","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:98cbb660bdc3d61642257595235132f35cd524796bdd7447050a93570a3da132 · sha256:49b2b3bc83ba6eba… · /containers/cna/problemTypes/0/descriptions/0
Source references
4 source assertions{"name":"https://github.com/hapifhir/org.hl7.fhir.core/commit/56376f7986222626af061ca7fc27ee1ab030e590","tags":["x_refsource_MISC"],"url":"https://github.com/hapifhir/org.hl7.fhir.core/commit/56376f7986222626af061ca7fc27ee1ab030e590"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:98cbb660bdc3d61642257595235132f35cd524796bdd7447050a93570a3da132 · sha256:49b2b3bc83ba6eba… · /containers/cna/references/1
{"name":"https://github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.10","tags":["x_refsource_MISC"],"url":"https://github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.10"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:98cbb660bdc3d61642257595235132f35cd524796bdd7447050a93570a3da132 · sha256:49b2b3bc83ba6eba… · /containers/cna/references/2
{"tags":["exploit"],"url":"https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-fxj4-p9xp-37v5"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:98cbb660bdc3d61642257595235132f35cd524796bdd7447050a93570a3da132 · sha256:49b2b3bc83ba6eba… · /containers/adp/0/references/0
{"name":"https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-fxj4-p9xp-37v5","tags":["x_refsource_CONFIRM"],"url":"https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-fxj4-p9xp-37v5"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:98cbb660bdc3d61642257595235132f35cd524796bdd7447050a93570a3da132 · sha256:49b2b3bc83ba6eba… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.