{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-16439 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-16439 is a medium-severity memory corruption vulnerability in Eclipse Foundation OpenJ9, published on 21 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-16439 and fix it if it is affected.\n\nWhat it is: CVE-2026-16439 is a medium-severity memory corruption vulnerability in Eclipse Foundation OpenJ9, published on 21 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-16439 in the wild and no public exploit code.\n\nAffected product: Eclipse Foundation OpenJ9. 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-2026-16439/ (Markdown: https://insights.sbomify.com/CVE-2026-16439/index.md)","id":"CVE-2026-16439","markdown":"https://insights.sbomify.com/CVE-2026-16439/index.md","name":"CVE-2026-16439","record":{"aliases":["GHSA-pw53-4wcc-wm6v"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"Java JVM","requires_auth":"low_privilege","summary":"Attackers can trigger a buffer underflow in Eclipse OpenJ9 by using the -Xtrace option to trace method arguments, potentially leading to code execution or crashes.","user_interaction":"required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"eclipse","cpe":[{"product":"openj9","vendor":"eclipse"}],"cvss":{"score":5.8,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:N/VI:H/VA:H/SC:N/SI:L/SA:L","version":"4.0"},"cwes":[{"id":"CWE-124","name":"Buffer Underwrite"}],"description":"In Eclipse OpenJ9 versions up to 0.60, using -Xtrace to trace method arguments can lead to buffer underflow.","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":"Eclipse OpenJ9 : Using -Xtrace to trace method arguments can lead to buffer underflow","id":"CVE-2026-16439","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Denial of service in Eclipse OpenJ9","id":"CVE-2026-16440"},"packages":[],"prev":{"headline":"An arbitrary operation vulnerability in GENESIS64, ICONICS Suite, Hyper Historian, AnalytiX, MobileHMI, and MC Works64","id":"CVE-2026-16438"},"products":["OpenJ9"],"published":"2026-07-21","related":[{"cvss_score":9.8,"headline":"Security feature bypass in Eclipse OMR","id":"CVE-2021-41035","kev_date_added":null,"published":"2021-10-25"},{"cvss_score":9.8,"headline":"Memory corruption in Eclipse OpenJ9","id":"CVE-2020-27221","kev_date_added":null,"published":"2021-01-21"},{"cvss_score":9.8,"headline":"Memory corruption in Eclipse OpenJ9","id":"CVE-2019-11772","kev_date_added":null,"published":"2019-07-17"},{"cvss_score":9.8,"headline":"Memory corruption in Eclipse OpenJ9","id":"CVE-2018-12547","kev_date_added":null,"published":"2019-02-11"},{"cvss_score":9.8,"headline":"Null dereference in Eclipse OpenJ9","id":"CVE-2018-12549","kev_date_added":null,"published":"2019-02-11"},{"cvss_score":9.8,"headline":"Memory corruption in Eclipse OpenJ9","id":"CVE-2018-12548","kev_date_added":null,"published":"2019-01-31"},{"cvss_score":9.1,"headline":"Missing authorization in Eclipse OpenJ9","id":"CVE-2019-17631","kev_date_added":null,"published":"2019-10-17"}],"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":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-07-22","vendors":["Eclipse Foundation"]},"summary":"Attackers can trigger a buffer underflow in Eclipse OpenJ9 by using the -Xtrace option to trace method arguments, potentially leading to code execution or crashes.","url":"https://insights.sbomify.com/CVE-2026-16439/"}