Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Apache Storm UI (storm-webapp, Maven org.apache.storm:storm-webapp) versions before 2.8.6 are vulnerable to stored cross-site scripting. An attacker who has topology submission rights can embed script in component IDs, which the UI then renders unsanitized in the visualization tooltips, so the script runs in the browser of anyone who views the topology, such as an administrator. Upgrade to 2.8.6 or later; if that is not possible, restrict topology submission to trusted users.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 5.4 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS 0.0047, the 41st percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:20 UTC First seen by agentprime
- 31 Oct 2026, 14:20 UTC Confirmed by OSV