{"answers":{"affected":"11 open source packages ship an affected version, including github.com/fleetdm/fleet and github.com/fleetdm/fleet/v4. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-23517 in the wild and no public exploit code.","fix":"Upgrade github.com/fleetdm/fleet to a fixed version for your release line: 4.75.2, 4.76.2, 4.77.1 or 4.78.3.","what":"CVE-2026-23517 is a medium-severity missing authorization vulnerability in fleetdm fleet, published on 21 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-23517 and fix it if it is affected.\n\nWhat it is: CVE-2026-23517 is a medium-severity missing authorization vulnerability in fleetdm fleet, published on 21 Jan 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-2026-23517 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/fleetdm/fleet (Go): affected from 4.75.0; fixed in 4.75.2\n- github.com/fleetdm/fleet (Go): affected from 4.75.0; fixed in 4.75.2\n- github.com/fleetdm/fleet (Go): affected from 4.76.0; fixed in 4.76.2\n- github.com/fleetdm/fleet (Go): affected from 4.76.0; fixed in 4.76.2\n- github.com/fleetdm/fleet (Go): affected from 4.77.0; fixed in 4.77.1\n- github.com/fleetdm/fleet (Go): affected from 4.77.0; fixed in 4.77.1\n- github.com/fleetdm/fleet (Go): affected from 4.78.0; fixed in 4.78.3\n- github.com/fleetdm/fleet (Go): affected from 4.78.0; fixed in 4.78.3\n- github.com/fleetdm/fleet/v4 (Go): affected all versions; fixed in 4.78.3-0.20260112221730-5c030e32a3a9\n- github.com/fleetdm/fleet/v4 (Go): affected all versions; fixed in 4.78.3-0.20260112221730-5c030e32a3a9\n- github.com/fleetdm/fleet/v4 (Go): affected from 4.75.0; fixed in 4.75.2, 4.76.2, 4.77.1, 4.78.3\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-2026-23517/ (Markdown: https://insights.sbomify.com/CVE-2026-23517/index.md)","id":"CVE-2026-23517","markdown":"https://insights.sbomify.com/CVE-2026-23517/index.md","name":"CVE-2026-23517","record":{"aliases":["GHSA-4r5r-ccr6-q6f6","GO-2026-4334"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Fleet device management","requires_auth":"low_privilege","summary":"Low-privilege users can access debug endpoints to view sensitive server internals and trigger denial of service.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"fleet","vendor":"fleetdm"}],"cvss":{"score":6.3,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U","version":"4.0"},"cwes":[{"id":"CWE-862","name":"Missing Authorization"}],"description":"Fleet is open source device management software. A broken access control issue in versions prior to 4.78.3, 4.77.1, 4.76.2, 4.75.2, and 4.53.3 allowed authenticated users to access debug and profiling endpoints regardless of role. As a result, low-privilege users could view internal server diagnostics and trigger resource-intensive profiling operations. Fleet’s debug/pprof endpoints are accessible to any authenticated user regardless of role, including the lowest-privilege “Observer” role. This allows low-privilege users to access sensitive server internals, including runtime profiling data and in-memory application state, and to trigger CPU-intensive profiling operations that could lead to denial of service. Versions 4.78.3, 4.77.1, 4.76.2, 4.75.2, and 4.53.3 fix the issue. If an immediate upgrade is not possible, users should put the debug/pprof endpoints behind an IP allowlist as a workaround.","ecosystems":["Go"],"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":"Fleet has an Access Control vulnerability in debug/pprof endpoints","id":"CVE-2026-23517","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"missing_authorization","year":"2026"},"n_packages":11,"n_references":2,"next":{"headline":"Fleet has a JWT signature bypass vulnerability in Azure AD MDM enrollment","id":"CVE-2026-23518"},"packages":[{"ecosystem":"Go","fixed":["4.75.2"],"introduced":["4.75.0"],"last_affected":[],"package":"github.com/fleetdm/fleet","purl":null,"source":"GHSA-4r5r-ccr6-q6f6"},{"ecosystem":"Go","fixed":["4.75.2"],"introduced":["4.75.0"],"last_affected":[],"package":"github.com/fleetdm/fleet","purl":"pkg:golang/github.com/fleetdm/fleet","source":"GHSA-4r5r-ccr6-q6f6"},{"ecosystem":"Go","fixed":["4.76.2"],"introduced":["4.76.0"],"last_affected":[],"package":"github.com/fleetdm/fleet","purl":null,"source":"GHSA-4r5r-ccr6-q6f6"},{"ecosystem":"Go","fixed":["4.76.2"],"introduced":["4.76.0"],"last_affected":[],"package":"github.com/fleetdm/fleet","purl":"pkg:golang/github.com/fleetdm/fleet","source":"GHSA-4r5r-ccr6-q6f6"},{"ecosystem":"Go","fixed":["4.77.1"],"introduced":["4.77.0"],"last_affected":[],"package":"github.com/fleetdm/fleet","purl":null,"source":"GHSA-4r5r-ccr6-q6f6"},{"ecosystem":"Go","fixed":["4.77.1"],"introduced":["4.77.0"],"last_affected":[],"package":"github.com/fleetdm/fleet","purl":"pkg:golang/github.com/fleetdm/fleet","source":"GHSA-4r5r-ccr6-q6f6"},{"ecosystem":"Go","fixed":["4.78.3"],"introduced":["4.78.0"],"last_affected":[],"package":"github.com/fleetdm/fleet","purl":null,"source":"GHSA-4r5r-ccr6-q6f6"},{"ecosystem":"Go","fixed":["4.78.3"],"introduced":["4.78.0"],"last_affected":[],"package":"github.com/fleetdm/fleet","purl":"pkg:golang/github.com/fleetdm/fleet","source":"GHSA-4r5r-ccr6-q6f6"},{"ecosystem":"Go","fixed":["4.78.3-0.20260112221730-5c030e32a3a9"],"introduced":["0"],"last_affected":[],"package":"github.com/fleetdm/fleet/v4","purl":null,"source":"GHSA-4r5r-ccr6-q6f6"},{"ecosystem":"Go","fixed":["4.78.3-0.20260112221730-5c030e32a3a9"],"introduced":["0"],"last_affected":[],"package":"github.com/fleetdm/fleet/v4","purl":"pkg:golang/github.com/fleetdm/fleet/v4","source":"GHSA-4r5r-ccr6-q6f6"},{"ecosystem":"Go","fixed":["4.75.2","4.76.2","4.77.1","4.78.3"],"introduced":["4.75.0","4.76.0","4.77.0","4.78.0"],"last_affected":[],"package":"github.com/fleetdm/fleet/v4","purl":"pkg:golang/github.com/fleetdm/fleet/v4","source":"GO-2026-4334"}],"prev":{"headline":"CVAT vulnerable to XSS via skeleton SVG images","id":"CVE-2026-23516"},"products":["fleet"],"published":"2026-01-21","related":[{"cvss_score":10,"headline":"SAML authentication vulnerability in Fleet","id":"CVE-2020-26276","kev_date_added":null,"published":"2020-12-17"},{"cvss_score":9.3,"headline":"Fleet before 4.87.0 Authentication Bypass via Device Identifiers","id":"CVE-2026-103264","kev_date_added":null,"published":"2026-10-01"},{"cvss_score":9.3,"headline":"Fleet has a JWT signature bypass vulnerability in Azure AD MDM enrollment","id":"CVE-2026-23518","kev_date_added":null,"published":"2026-01-21"},{"cvss_score":8.7,"headline":"Fleet server may terminate unexpectedly when handling certain gRPC requests","id":"CVE-2026-26062","kev_date_added":null,"published":"2026-05-14"},{"cvss_score":8.7,"headline":"Fleet's unbounded request body read allows remote Denial of Service","id":"CVE-2026-26061","kev_date_added":null,"published":"2026-03-27"},{"cvss_score":8.2,"headline":"Fleet has a Windows MDM management endpoint authentication bypass","id":"CVE-2026-23998","kev_date_added":null,"published":"2026-05-14"},{"cvss_score":8.2,"headline":"Fleet Windows MDM Azure AD JWT Authentication Bypass","id":"CVE-2026-24899","kev_date_added":null,"published":"2026-05-14"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"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":"2026-01-22","vendors":["fleetdm"]},"summary":"Low-privilege users can access debug endpoints to view sensitive server internals and trigger denial of service.","url":"https://insights.sbomify.com/CVE-2026-23517/"}