What’s Vulnerable › Vulnerabilities

CVE-2026-48722: Nextflow: Incorrect default permissions in the nextflow auth login command

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-15 · updated 2026-09-30
• Weakness: CWE-276

Description

Nextflow is a DSL for data-driven computational pipelines. From 25.09.2-edge until 25.10.6 and 26.04.3, nextflow auth login writes Seqera Platform OIDC bearer tokens to ${NXF_HOME:-~/.nextflow}/seqera-auth.config through AuthCommandImpl.writeConfig in plugins/nf-tower/src/main/io/seqera/tower/plugin/auth/AuthCommandImpl.groovy without setting restrictive file permissions, allowing the default umask 022 to create the file with mode 0644. On a multi-user POSIX host, a local user who can traverse the victim's home directory can read seqera-auth.config and impersonate the victim against Seqera Platform within the token's scope. Single-user systems and headless CI runners that do not use the interactive login flow are not affected. This issue is fixed in 25.10.6 and 26.04.3.

Affected products

• nextflow-io nextflow: from 25.09.2-edge, < 25.10.6; from 25.11.0-edge, < 26.04.3

References

• https://github.com/nextflow-io/nextflow/commit/41a5f24afec8a6e9769a24cae5e08b5462fbfdc1
• https://github.com/nextflow-io/nextflow/commit/a2813c610a3e7f13d7a0a0b1b543b7ad47586eaa
• https://github.com/nextflow-io/nextflow/pull/7182
• https://github.com/nextflow-io/nextflow/releases/tag/v25.10.6
• https://github.com/nextflow-io/nextflow/releases/tag/v26.04.3
• https://github.com/nextflow-io/nextflow/security/advisories/GHSA-92qf-fcph-v5wr

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