{"id":"CVE-2026-44592","summary":"Gradient: Unauthenticated worker on /proto → arbitrary NAR write / cache poisoning","details":"Gradient is a nix-based continuous integration system. In 1.1.0, when GRADIENT_DISCOVERABLE=true (the default, and the NixOS module default), anyone who can reach /proto can register as a worker without any credentials by sending a fresh, never-registered worker UUID. The resulting session has PeerAuth::Open, i.e. it sees jobs from every organisation, and can immediately NarPush/NarUploaded arbitrary store paths into nar_storage and the cached_path table. This vulnerability is fixed in 1.1.1.","aliases":["GHSA-49w6-gf3p-96m2"],"modified":"2026-08-12T03:51:11.968262303Z","published":"2026-05-14T18:39:59.824Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44592.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-306","CWE-345","CWE-862"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44592.json"},{"type":"ADVISORY","url":"https://github.com/wavelens/gradient/security/advisories/GHSA-49w6-gf3p-96m2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44592"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/wavelens/gradient","events":[{"introduced":"9b2eba5662d96ab31b55f220220f780f8e761afa"},{"last_affected":"9b2eba5662d96ab31b55f220220f780f8e761afa"}],"database_specific":{"extracted_events":[{"introduced":"1.1.0"},{"last_affected":"1.1.0"}],"source":"AFFECTED_FIELD"}}],"versions":["1.1.0","v1.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44592.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H"}]}