MITM based Zip Slip in org.hl7.fhir.publisher:org.hl7.fhir.publisher

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

9.1 · CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

EPSS

No dated EPSS signal available.

As published by the source; long descriptions are shortened.

Impact MITM can enable Zip-Slip. Vulnerability Vulnerability 1: Publisher.java There is no validation that the zip file being unpacked has entries that are not maliciously writing outside of the intended destination directory. https://github.com/HL7/fhir-ig-publisher/blob/87313e92de6dd6cea816449e0edd225e054a7891/org.hl7.fhir.publisher.core/src/main/java/org/hl7/fhir/igtools/publisher/Publisher.java#L3598-L3610 Vulnerability 2: WebSourceProvider.java There is a check for malicious zip entries here, but it is not covered by test cases and could potentially be reverted in future changes. https://github.com/HL7/fhir-ig-publisher/blob/87313e92de6dd6cea816449e0edd225e054a7891/org.hl7.fhir.publisher.core/src/main/java/org/hl7/fhir/igtools/web/WebSourceProvider.java#L104-L112 Vulnerability 3: ZipFetcher.java This retains the path for Zip files in FetchedFile entries, which could later be used to output malicious entries to another compressed file or file system.…

Published by the source

23 Jan 2023, 22:04 UTC

Last modified by the source

23 Jan 2023, 22:04 UTC

Source last checked

26 Oct 2026, 15:53 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-xr8x-pxm6-prjg

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# Patch Next advisory brief: GHSA-xr8x-pxm6-prjg

Advisory: MITM based Zip Slip in `org.hl7.fhir.publisher:org.hl7.fhir.publisher`
IDs: GHSA-xr8x-pxm6-prjg
Record: https://patchnext.com/advisories/ghsa-xr8x-pxm6-prjg (revision 1, source checked 26 Oct 2026, 15:53 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: org.hl7.fhir.publisher:org.hl7.fhir.publisher 1.2.30. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven org.hl7.fhir.publisher:org.hl7.fhir.publisher: affected < 1.2.30; fixed in 1.2.30

## Suggested inspection (read-only)
- Maven org.hl7.fhir.publisher:org.hl7.fhir.publisher: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on org.hl7.fhir.publisher:org.hl7.fhir.publisher.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-xr8x-pxm6-prjg (GitHub-reviewed advisory GHSA-xr8x-pxm6-prjg lists affected ranges: Maven org.hl7.fhir.publisher:org.hl7.fhir.publisher >=0 <1.2.30)

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