PatchTheCVEorthanc vulnerabilities and fixes
Recent CVEs affecting orthanc, with upgrade or downgrade steps. 2 tracked.
orthanc has 2 tracked vulnerabilities, 0 critical. A fixed release or vendor patch exists for 2. Most recent: 2026-04-09. Highest priority: CVE-2026-5438 (score 42/100).
- CVE-2026-5438 HIGH 7.5 UPGRADE A gzip decompression bomb vulnerability exists when Orthanc processes HTTP request with `Content-Encoding: gzi
- CVE-2026-5444 HIGH 7.1 UPGRADE A heap buffer overflow vulnerability exists in the PAM image parsing logic
FAQ
How do I fix orthanc vulnerabilities?
Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.
Is orthanc being exploited right now?
None of the tracked orthanc CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which orthanc CVE should I patch first?
CVE-2026-5438 currently ranks highest (42/100): A gzip decompression bomb vulnerability exists when Orthanc processes HTTP request with `Content-Encoding: gzi.