CVE-2026-49485 HAPI FHIR: ReDoS via FHIRPath matches()/replaceMatches() in FHIR Validator HTTP Endpoint

HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to 6.9.9 and 6.9.4.2, all implementations of FHIRPathEngine accept arbitrary FHIRPath expressions and evaluate them without input validation, and the FHIRPath functions matches,...

CVE-2026-49485

Summary: CVE-2026-49485 affects HAPI FHIR’s FHIRPathEngine (matches(), matchesFull(), replaceMatches()) where user-controlled regex patterns are compiled via Java’s regex engine, enabling ReDoS and CPU exhaustion. The issue exists in implementations prior to version 6.9.9 and 6.9.4.2. An attacker...

CVE-2026-49485 HAPI FHIR: ReDoS via FHIRPath matches()/replaceMatches() in FHIR Validator HTTP Endpoint

HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to 6.9.9 and 6.9.4.2, all implementations of FHIRPathEngine accept arbitrary FHIRPath expressions and evaluate them without input validation, and the FHIRPath functions matches,...

CVE-2026-45367

CVE-2026-45367 affects HAPI FHIR DSTU2 module (org.hl7.fhir.dstu2) where FHIRPathEngine.matches() still calls String.matches() without a timeout, enabling potential ReDoS via user-supplied FHIRPath expressions. Other modules (DSTU2016MAY, DSTU3, R4, R4B, R5) have RegexTimeout protection and are f...

CVE-2026-45367 HAPI FHIR: ReDoS via FHIRPath matches()/replaceMatches() in FHIR Validator HTTP Endpoint

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,...

Regular Expression Denial of Service (ReDoS)

Amendment This was deemed not a vulnerability. Overview Affected versions of this package are vulnerable to Regular Expression Denial of Service ReDoS via the matches, matchesFull, and replaceMatches functions in FHIRPath expression evaluation. An attacker can exhaust system CPU resources by...

Regular Expression Denial of Service (ReDoS)

Amendment This was deemed not a vulnerability. Overview Affected versions of this package are vulnerable to Regular Expression Denial of Service ReDoS via the matches, matchesFull, and replaceMatches functions in FHIRPath expression evaluation. An attacker can exhaust system CPU resources by...

Regular Expression Denial of Service (ReDoS)

Overview Affected versions of this package are vulnerable to Regular Expression Denial of Service ReDoS via the matches, matchesFull, and replaceMatches functions in FHIRPath expression evaluation. An attacker can exhaust system CPU resources by submitting specially crafted regular expressions th...

Regular Expression Denial of Service (ReDoS)

Overview Affected versions of this package are vulnerable to Regular Expression Denial of Service ReDoS via the matches, matchesFull, and replaceMatches functions in FHIRPath expression evaluation. An attacker can exhaust system CPU resources by submitting specially crafted regular expressions th...

Regular Expression Denial of Service (ReDoS)

Overview Affected versions of this package are vulnerable to Regular Expression Denial of Service ReDoS via the matches, matchesFull, and replaceMatches functions in FHIRPath expression evaluation. An attacker can exhaust system CPU resources by submitting specially crafted regular expressions th...

org.hl7.fhir.core: ReDoS via FHIRPath matches()/replaceMatches() in FHIR Validator HTTP Endpoint

All implementations of FHIRPathEngine accept arbitrary FHIRPath expressions and evaluate them without input validation. The utility intended to secure this evaluation did so incorrectly, and did not fully cover all places in which evaluation was being done. An attacker can send a resource...

org.hl7.fhir.core: ReDoS via FHIRPath matches()/replaceMatches() in FHIR Validator HTTP Endpoint

All implementations of FHIRPathEngine accept arbitrary FHIRPath expressions and evaluate them without input validation. The utility intended to secure this evaluation did so incorrectly, and did not fully cover all places in which evaluation was being done. An attacker can send a resource...

org.hl7.fhir.core: ReDoS via FHIRPath matches()/replaceMatches() in FHIR Validator HTTP Endpoint

All implementations of FHIRPathEngine accept arbitrary FHIRPath expressions and evaluate them without input validation. The utility intended to secure this evaluation did so incorrectly, and did not fully cover all places in which evaluation was being done. An attacker can send a resource...

org.hl7.fhir.core: ReDoS via FHIRPath matches()/replaceMatches() in FHIR Validator HTTP Endpoint

All implementations of FHIRPathEngine accept arbitrary FHIRPath expressions and evaluate them without input validation. The utility intended to secure this evaluation did so incorrectly, and did not fully cover all places in which evaluation was being done. An attacker can send a resource...

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.matchessw...

au.csiro.pathling:encoders (>=6.2.2 <=9.5.0), au.csiro.pathling:fhir-server (>=6.2.2 <=7.2.0) +244 more potentially affected by CVE-2026-55471 via ca.uhn.hapi.fhir:org.hl7.fhir.utilities (>=6.0.0 <=6.9.1)

ca.uhn.hapi.fhir:org.hl7.fhir.utilities MAVEN version =6.0.0, =6.2.2, =6.2.2, =6.2.2, =6.2.2, =6.2.2, =6.2.2, =6.6.0, =6.6.0, =6.6.0, =6.6.0, =6.6.0, =6.6.0, =8.8.1 and more Source cves: CVE-2026-55471 Source advisory: SNYK:JAVA-CAUHNHAPIFHIR-17372948...

HAPI FHIR: Incomplete fix for CVE-2026-45367: DSTU2 FHIRPathEngine.matches() missing RegexTimeout protection allows ReDoS

The fix for CVE-2026-45367 added RegexTimeout protection to the matches function in DSTU2016MAY, DSTU3, R4, R4B, and R5, but the DSTU2 module was incompletely patched. In org.hl7.fhir.dstu2, replaceMatches was updated while matches at line 2462 still calls the raw String.matchessw without any...

HAPI FHIR: ReDoS via FHIRPath matches()/replaceMatches() in FHIR Validator HTTP Endpoint

All implementations of FHIRPathEngine accept arbitrary FHIRPath expressions and evaluate them without input validation. The FHIRPath functions matches, matchesFull, and replaceMatches pass user-controlled regular expressions directly to Java's Pattern.compile and String.replaceAll without...

HAPI FHIR: ReDoS via FHIRPath matches()/replaceMatches() in FHIR Validator HTTP Endpoint

All implementations of FHIRPathEngine accept arbitrary FHIRPath expressions and evaluate them without input validation. The FHIRPath functions matches, matchesFull, and replaceMatches pass user-controlled regular expressions directly to Java's Pattern.compile and String.replaceAll without...

HAPI FHIR: ReDoS via FHIRPath matches()/replaceMatches() in FHIR Validator HTTP Endpoint

All implementations of FHIRPathEngine accept arbitrary FHIRPath expressions and evaluate them without input validation. The FHIRPath functions matches, matchesFull, and replaceMatches pass user-controlled regular expressions directly to Java's Pattern.compile and String.replaceAll without...