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Vulnerability · Published Sep 15, 2026 · Assigned by GitHub_M

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

Medium 5.5

In plain English

A medium-severity incorrect default permissions in nextflow from nextflow-io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.1%top 96.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Mavenio.nextflow:nextflow25.10.6GHSA-92qf-fcph-v5wr
Mavenio.nextflow:nextflow26.04.3GHSA-92qf-fcph-v5wr

Affected products (as reported)

VendorProductVersions
nextflow-io nextflow >= 25.09.2-edge, < 25.10.6>= 25.11.0-edge, < 26.04.3

Weakness: CWE-276, CWE-732 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References