CVE-2026-124496 Apache Storm: DRPC HTTP doAsUser bypasses the impersonation authorizer
Authenticated Apache Storm users can call DRPC functions restricted to other users, bypassing the impersonation authorizer.
- 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-2026-124496?
CVE-2026-124496 is a missing authorization 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
The DRPC HTTP endpoint lets an authenticated client act as another user without applying the configured impersonation authorizer. An authenticated user can execute DRPC functions that are restricted to another user. Users are recommended to upgrade to version 3.2.0, which fixes the issue.
Weakness: CWE-863
Which versions are affected by CVE-2026-124496?
Only installations with a non-default setting turned on are exposed.
How do I fix CVE-2026-124496?
No fix has been published for CVE-2026-124496 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-124496 being exploited?
There is no known exploitation of CVE-2026-124496 in the wild and no public exploit code.
Sources
Also known as GHSA-7fq5-f2mw-c994.