{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-78587 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-78587 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-78587 is a low-severity missing authorization vulnerability in Elastic Fleet Server, published on 2 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-78587 and fix it if it is affected.\n\nWhat it is: CVE-2026-78587 is a low-severity missing authorization vulnerability in Elastic Fleet Server, published on 2 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-78587 in the wild and no public exploit code.\n\nAffected product: Elastic Fleet 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-2026-78587/ (Markdown: https://insights.sbomify.com/CVE-2026-78587/index.md)","id":"CVE-2026-78587","markdown":"https://insights.sbomify.com/CVE-2026-78587/index.md","name":"CVE-2026-78587","record":{"aliases":["GHSA-cg8q-4j53-92fq"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Elastic Fleet Server","requires_auth":"low_privilege","summary":"Authenticated agents can disrupt other agents' upload sessions due to missing session ownership checks, causing denial of service.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"elastic","cpe":[{"product":"fleet_server","vendor":"elastic"}],"cvss":{"score":3.1,"severity":"low","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-863","name":"Incorrect Authorization"}],"description":"Incorrect Authorization (CWE-863) in Fleet Server can lead to a denial of service of agent upload operations via Privilege Abuse (CAPEC-122). Fleet Server does not correctly verify session ownership during multi-part data upload operations, allowing any authenticated agent to interfere with the active upload sessions belonging to other enrolled agents.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Incorrect Authorization in Fleet Server Leading to Denial of Service of Agent Upload Operations","id":"CVE-2026-78587","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"missing_authorization","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Allocation of Resources Without Limits or Throttling in Filebeat Leading to Denial of Service","id":"CVE-2026-78588"},"packages":[],"prev":{"headline":"Allocation of Resources Without Limits or Throttling in Kibana Leading to Denial of Service","id":"CVE-2026-78586"},"products":["Fleet Server"],"published":"2026-09-02","related":[{"cvss_score":8.1,"headline":"Fleet Server Insertion of Sensitive Information into Log File","id":"CVE-2023-46667","kev_date_added":null,"published":"2023-10-26"},{"cvss_score":6.5,"headline":"Authorization Bypass Through User-Controlled Key in Fleet Server Leading to Information Disclosure","id":"CVE-2026-72657","kev_date_added":null,"published":"2026-08-13"},{"cvss_score":6.5,"headline":"Allocation of Resources Without Limits or Throttling in Fleet Server Leading to Denial of Service","id":"CVE-2026-56150","kev_date_added":null,"published":"2026-07-01"}],"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":"partial"},"state":"PUBLISHED","updated":"2026-09-02","vendors":["Elastic"]},"summary":"Authenticated agents can disrupt other agents' upload sessions due to missing session ownership checks, causing denial of service.","url":"https://insights.sbomify.com/CVE-2026-78587/"}