{"id":"CVE-2026-48722","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-48722","summary":"nextflow auth login command has incorrect default permissions","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":"2026-06-25T21:45:55Z","modified":"2026-06-25T22:00:08.006282479Z","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":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Maven","name":"io.nextflow:nextflow","fixedVersion":"25.10.6"},{"ecosystem":"Maven","name":"io.nextflow:nextflow","fixedVersion":"26.04.3"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/nextflow-io/nextflow/security/advisories/GHSA-92qf-fcph-v5wr"},{"type":"PACKAGE","url":"https://github.com/nextflow-io/nextflow"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-06-25T22:00:08.006282479Z"}}