Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
GeoServer's gs-rest (Maven org.geoserver:gs-rest) and gs-web-app (org.geoserver.web:gs-web-app) before 2.26.0 are affected. The Coverage REST API accepts a URL when uploading a coverage store file, and that URL is not checked against the URL Checks feature. An attacker who can access the REST API with permission to upload coverage data can cause the server to make requests to arbitrary URLs (server-side request forgery). Upgrade to 2.26.0 or later.
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 |
|---|---|---|---|---|
| 5.5 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:L | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0039, the 33rd percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:11 UTC First seen by agentprime
- 31 Oct 2026, 15:11 UTC Confirmed by OSV