{"id":"CVE-2026-101046","aliases":["GHSA-rxhg-vcww-2mpw","GO-2026-6269"],"url":"https://o3.security/vulnerability/CVE-2026-101046","summary":"Fleet before 4.89.0 SQL Injection via ORDER BY Activity Endpoints","details":"### Summary\n\nAn authenticated user with read access to Activity could influence the `ORDER BY` clause of the activity list endpoints by supplying an arbitrary sort column:\n\n- `GET /api/v1/fleet/activities` (`ListActivities`)\n- `GET /api/v1/fleet/hosts/{id}/activities` (`ListHostPastActivities`)\n\nThis originated from the deprecated cursor-pagination helper (`appendListOptionsWithCursorToSQL`), which interpolated the caller-supplied order key into SQL without an allowlist. The original report's `node_key` extraction scenario (`/api/v1/fleet/labels/{id}/hosts`) was remediated separately in #44385; these two activity endpoints were the residual call sites, neither of which joins the `hosts` table, so `node_key` was never reachable through them.\n\n### Impact\n\nRead-only. Because the order key was interpolated, an authenticated user with Activity read could sort by columns not otherwise returned in these responses. The exposure was bounded to columns on `activity_past` (e.g. `details` on `/api/v1/fleet/activities`, which is not in that endpoint's SELECT; host-only activities are already excluded by `WHERE host_only = false`). There is no privilege escalation, write access, or reachability of `node_key` or other host-join columns through these endpoints.\n\n### Remediation\n\nThe deprecated helper was removed from the codebase. Both endpoints now pass the caller-supplied sort column through `SanitizeColumn`, which strips all characters except `[\\w-.]` and backtick-quotes each identifier segment. This closes the injection vector: separators, whitespace, parentheses, and quotes cannot survive sanitization, so an expression-based `ORDER BY` oracle is not constructable.\n\n### Affected versions\n\n`< fleet-v4.89.0`. Fixed in `fleet-v4.89.0`.\n\n### Credit\n\nThanks to @axel-corsiez for the report.","published":"2026-09-27T17:02:35.154Z","modified":"2026-10-02T03:30:46.064032547Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Go","name":"github.com/fleetdm/fleet/v4","fixedVersion":"4.89.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/101xxx/CVE-2026-101046.json"},{"type":"ADVISORY","url":"https://github.com/fleetdm/fleet/security/advisories/GHSA-rxhg-vcww-2mpw"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-101046"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/fleet-before-4.89.0-sql-injection-via-order-by-activity-endpoints"},{"type":"PACKAGE","url":"https://github.com/fleetdm/fleet"},{"type":"WEB","url":"https://github.com/fleetdm/fleet/releases/tag/fleet-v4.89.0"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-02T03:30:46.064032547Z"}}