CVE-2026-124495 Apache Storm: Logviewer follows worker symlinks across topology ACLs
Topology submitters can use worker symlinks to read other users' logs and files in Apache Storm; Storm operators should upgrade.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Harmful if only installed
- No
- Needs a specific call
- No
- Fix
- None listed
What is CVE-2026-124495?
CVE-2026-124495 is a path traversal vulnerability in Apache Storm, published on 11 Nov 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
When workers run as the topology owner, the Logviewer serves files that a worker has placed in its own log directory as links to other files. A user who is allowed to submit topologies can read the worker logs of other users' topologies, and other files the Logviewer process can read. Users are recommended to upgrade to version 3.2.0, which fixes the issue.
Weakness: CWE-59
Which versions are affected by CVE-2026-124495?
An affected version is exposed as installed. No special setting or call is needed.
How do I fix CVE-2026-124495?
No fix has been published for CVE-2026-124495 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-124495 being exploited?
There is no known exploitation of CVE-2026-124495 in the wild and no public exploit code.
Sources
Also known as GHSA-f638-2mcj-vhqq.