{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-5438 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-5438 is a high-severity denial of service vulnerability in Orthanc DICOM Server, published on 9 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-5438 and fix it if it is affected.\n\nWhat it is: CVE-2026-5438 is a high-severity denial of service vulnerability in Orthanc DICOM Server, published on 9 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-5438 in the wild and no public exploit code.\n\nAffected product: Orthanc DICOM Server. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-5438/ (Markdown: https://insights.sbomify.com/CVE-2026-5438/index.md)","id":"CVE-2026-5438","markdown":"https://insights.sbomify.com/CVE-2026-5438/index.md","name":"CVE-2026-5438","record":{"aliases":["DEBIAN-CVE-2026-5438","GHSA-7vj5-pm38-6wjv","UBUNTU-CVE-2026-5438"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"DICOM Server","requires_auth":"none","summary":"Attackers can cause memory exhaustion and denial of service in Orthanc DICOM Server by sending crafted gzip payloads via HTTP requests.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"certcc","cpe":[{"product":"orthanc","vendor":"orthanc-server"}],"cvss":{"score":7.5,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"A gzip decompression bomb vulnerability exists when Orthanc processes HTTP request with `Content-Encoding: gzip`. The server does not enforce limits on decompressed size and allocates memory based on attacker-controlled compression metadata. A specially crafted gzip payload can trigger excessive memory allocation and exhaust system memory.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Gzip Decompression Bomb via Content-Encoding Header","id":"CVE-2026-5438","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"Memory Exhaustion via Forged ZIP Metadata","id":"CVE-2026-5439"},"packages":[],"prev":{"headline":"Out-of-Bounds Read in DicomStreamReader","id":"CVE-2026-5437"},"products":["DICOM Server"],"published":"2026-04-09","related":[{"cvss_score":9.8,"headline":"Heap Buffer Overflow in DICOM Image Decoder via VR UL Dimensions","id":"CVE-2026-5442","kev_date_added":null,"published":"2026-04-09"},{"cvss_score":9.8,"headline":"Heap Buffer Overflow in DICOM Image Decoder (Palette Color Decode)","id":"CVE-2026-5443","kev_date_added":null,"published":"2026-04-09"},{"cvss_score":9.2,"headline":"Orthanc Server Missing Authentication for Critical Function","id":"CVE-2025-0896","kev_date_added":null,"published":"2025-02-13"},{"cvss_score":9.1,"headline":"Out-of-Bounds Read in DicomImageDecoder (DecodeLookupTable)","id":"CVE-2026-5445","kev_date_added":null,"published":"2026-04-09"},{"cvss_score":8.8,"headline":"Path traversal in n/a","id":"CVE-2023-33466","kev_date_added":null,"published":"2023-06-29"},{"cvss_score":7.5,"headline":"Out-of-Bounds Read in DicomStreamReader","id":"CVE-2026-5437","kev_date_added":null,"published":"2026-04-09"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-14","vendors":["Orthanc"]},"summary":"Attackers can cause memory exhaustion and denial of service in Orthanc DICOM Server by sending crafted gzip payloads via HTTP requests.","url":"https://insights.sbomify.com/CVE-2026-5438/"}