{"id":"CVE-2026-61801","summary":"github.com/moby/sys/user has a possible DoS via unbounded parsing of user and group database files","details":"The `github.com/moby/sys/user` package provides Go utilities for parsing and looking up entries in Unix-style user and group database files. Versions before 0.4.1 do not sufficiently limit entries when parsing `/etc/passwd`- or `/etc/group`-style files, allowing an attacker who can supply a specially crafted file to cause excessive memory consumption and potentially terminate the affected process due to an out-of-memory condition. This issue is patched in version 0.4.1. As a workaround, avoid parsing attacker-controlled user or group database files, or validate and limit untrusted input before parsing it.","aliases":["GHSA-mjcv-p78q-w5fw"],"modified":"2026-10-09T02:49:19.296752420Z","published":"2026-10-08T16:22:25.558Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-400"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61801.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61801.json"},{"type":"FIX","url":"https://github.com/moby/sys/commit/85a71bbe1faa36c552a960e6a5f3d0cfb632fbbe"},{"type":"FIX","url":"https://github.com/moby/sys/pull/221"},{"type":"ADVISORY","url":"https://github.com/moby/sys/security/advisories/GHSA-mjcv-p78q-w5fw"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-61801"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/moby/sys","events":[{"introduced":"0"},{"fixed":"85a71bbe1faa36c552a960e6a5f3d0cfb632fbbe"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"fixed":"0.4.1"}]}}],"versions":["sequential/v0.7.0","mount/v0.3.5","devices/v0.1.0","atomicwriter/v0.1.0","user/v0.4.0","reexec/v0.1.0","capability/v0.4.0","capability/v0.3.0","capability/v0.2.0","userns/v0.1.0","user/v0.3.0","user/v0.2.0","mount/v0.3.4","symlink/v0.3.0","signal/v0.7.1","sequential/v0.6.0","mountinfo/v0.7.2","mountinfo/v0.7.1","mountinfo/v0.7.0","user/v0.1.0","sequential/v0.5.0","mount/v0.3.3","mountinfo/v0.6.2","mount/v0.3.2","mountinfo/v0.6.1","signal/v0.7.0","mount/v0.3.1","mountinfo/v0.6.0","symlink/v0.2.0","signal/v0.6.0","mount/v0.3.0","mountinfo/v0.5.0","signal/v0.5.0","mountinfo/v0.4.1","mount/v0.2.0","symlink/v0.1.0","mountinfo/v0.4.0","mountinfo/v0.3.1","mountinfo/v0.3.0","mountinfo/v0.2.0","mount/v0.1.1","mountinfo/v0.1.3","mountinfo/v0.1.2","mount/v0.1.0","mountinfo/v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-61801.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}