CVE-2026-45367
HAPI FHIR: ReDoS via FHIRPath matches()/replaceMatches() in FHIR Validator HTTP Endpoint
- 7.5HighCVSS base score
- 0.68%Exploitation in 30 daysEPSS · top 47% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to 6.9.7, the FHIRPathEngine implementation passes user-controlled regular expressions from matches(), matchesFull(), and replaceMatches() to Java regex operations without effective timeouts, allowing catastrophic backtracking and denial of service. This issue is fixed in version 6.9.7.
Timeline
ID reserved
By GitHub_M
- 2 months later
· 2 months later
Published
- 2 days later
· 2 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Awaiting Analysis | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.68% · top 47% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
- affected < 6.9.7
Affected packages
Affected packages8
From reviewed advisories of the GitHub Advisory Database.
- Mavenca.uhn.hapi.fhir:org.hl7.fhir.dstu2GHSA-3653-68v6-rq57 (opens in a new tab)
- Mavenca.uhn.hapi.fhir:org.hl7.fhir.dstu2016mayGHSA-3653-68v6-rq57 (opens in a new tab)
- Mavenca.uhn.hapi.fhir:org.hl7.fhir.dstu3GHSA-3653-68v6-rq57 (opens in a new tab)
- Mavenca.uhn.hapi.fhir:org.hl7.fhir.r4GHSA-3653-68v6-rq57 (opens in a new tab)
- Mavenca.uhn.hapi.fhir:org.hl7.fhir.r4bGHSA-3653-68v6-rq57 (opens in a new tab)
- Mavenca.uhn.hapi.fhir:org.hl7.fhir.r5GHSA-3653-68v6-rq57 (opens in a new tab)
- Mavenca.uhn.hapi.fhir:org.hl7.fhir.validationGHSA-3653-68v6-rq57 (opens in a new tab)
- Mavenca.uhn.hapi.fhir:org.hl7.fhir.validation.cliGHSA-3653-68v6-rq57 (opens in a new tab)
References
References6
- https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-3653-68v6-rq57 (opens in a new tab)x_refsource_CONFIRM
- https://github.com/hapifhir/org.hl7.fhir.core/pull/2403 (opens in a new tab)x_refsource_MISC
- https://github.com/hapifhir/org.hl7.fhir.core/pull/2463 (opens in a new tab)x_refsource_MISC
- https://github.com/hapifhir/org.hl7.fhir.core/commit/275d015c680ce9f90cbe285596e50118e472bf24 (opens in a new tab)x_refsource_MISC
- https://github.com/hapifhir/org.hl7.fhir.core/commit/e08982d2b6f6dcd6c670a762d9cf999179fbe4ed (opens in a new tab)x_refsource_MISC
- https://github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.7 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-44983 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-3653-68v6-rq57 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-45367)Record last updated .