{"id":"CVE-2026-48722","aliases":["GHSA-92qf-fcph-v5wr"],"url":"https://o3.security/vulnerability/CVE-2026-48722","summary":"Nextflow: Incorrect default permissions in the nextflow auth login command","details":"### Impact\n\n`nextflow auth login` persists Seqera Platform OIDC tokens to `${NXF_HOME:-~/.nextflow}/seqera-auth.config`. The file is created via Java NIO without specifying file permissions, so under the default `umask 022` it lands at mode `0644` (world-readable).\n\nOn a multi-user POSIX host — typically an HPC login node, shared workstation, or jump host — any local user able to traverse the victim's home directory can read the file and obtain a valid Platform bearer token, enabling impersonation against Seqera Platform within the token's scope.\n\nSingle-user systems and headless CI runners, which do not invoke the interactive login flow, are not affected.\n\nAffected versions:  `25.09.2-edge` through `26.04.1`.\n  \n### Patches\n\nFixed in `<PATCHED_VERSION>`. The patched code applies mode `0600` to `seqera-auth.config` immediately after writing it, and re-applies on every subsequent login so any pre-existing world-readable copy left by an earlier version is tightened.\n\nTokens previously stored in the file must be treated as disclosed. After upgrading, run `nextflow auth logout`, revoke the token in the Seqera Platform UI, and run `nextflow auth login` again.\n\n### Workarounds\n  \nRestrict the file and its parent directory:\n\n`chmod 600 \"${NXF_HOME:-$HOME/.nextflow}/seqera-auth.config\"`\n`chmod 700 \"${NXF_HOME:-$HOME/.nextflow}\"`\n\nAlternatively, supply the Platform token via the `TOWER_ACCESS_TOKEN` environment variable instead of running `nextflow auth login`.\n\n### References\n  \n  - https://cwe.mitre.org/data/definitions/276.html","published":"2026-09-15T14:07:45.568Z","modified":"2026-10-21T02:58:21.136562648Z","cvss":{"score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},"epss":{"score":0.001,"percentile":0.00983,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"io.nextflow:nextflow","fixedVersion":"25.10.6"},{"ecosystem":"Maven","name":"io.nextflow:nextflow","fixedVersion":"26.04.3"}],"fix":{"url":"https://github.com/nextflow-io/nextflow/commit/41a5f24afec8a6e9769a24cae5e08b5462fbfdc1","label":"nextflow-io/nextflow@41a5f24"},"references":[{"type":"WEB","url":"https://github.com/nextflow-io/nextflow/releases/tag/v25.10.6"},{"type":"WEB","url":"https://github.com/nextflow-io/nextflow/releases/tag/v26.04.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48722.json"},{"type":"ADVISORY","url":"https://github.com/nextflow-io/nextflow/security/advisories/GHSA-92qf-fcph-v5wr"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48722"},{"type":"FIX","url":"https://github.com/nextflow-io/nextflow/commit/41a5f24afec8a6e9769a24cae5e08b5462fbfdc1"},{"type":"FIX","url":"https://github.com/nextflow-io/nextflow/commit/a2813c610a3e7f13d7a0a0b1b543b7ad47586eaa"},{"type":"FIX","url":"https://github.com/nextflow-io/nextflow/pull/7182"},{"type":"PACKAGE","url":"https://github.com/nextflow-io/nextflow"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-21T02:58:21.136562648Z"}}