CVE-2026-48722 Nextflow: Incorrect default permissions in the nextflow auth login command
Local attackers can read Nextflow auth tokens due to insecure file permissions, enabling impersonation of the victim on Seqera Platform.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-48722?
CVE-2026-48722 is a medium-severity vulnerability in nextflow-io nextflow, published on 15 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
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.
Which versions are affected by CVE-2026-48722?
4 open source packages ship an affected version, including io.nextflow:nextflow.
| Package | Affected | Fixed in |
|---|---|---|
io.nextflow:nextflow Maven | From 25.09.2-edge | 25.10.6 |
io.nextflow:nextflow Maven | From 25.09.2-edge | 25.10.6 |
io.nextflow:nextflow Maven | From 26.00.0-edge | 26.04.3 |
io.nextflow:nextflow Maven | From 26.00.0-edge | 26.04.3 |
How do I fix CVE-2026-48722?
Upgrade io.nextflow:nextflow to a fixed version for your release line: 25.10.6 or 26.04.3.
Is CVE-2026-48722 being exploited?
There is no known exploitation of CVE-2026-48722 in the wild and no public exploit code.
Sources
Also known as GHSA-92qf-fcph-v5wr.