Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
GeoServer's gs-wps-core Maven package is affected in versions below 2.22.5, and from 2.23.0 up to 2.23.2. An attacker who can send WPS Execute requests can make the server fetch external URLs, which is server-side request forgery. This applies only when the WPS extension is installed, "Disable complex inputs" is unselected, and security URL checks are disabled. Upgrade to 2.22.5 or 2.23.2, and enable URL Checks under Security > URL Checks.
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 |
|---|---|---|---|---|
| 8.6 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.69, the 99th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:18 UTC First seen by agentprime
- 31 Oct 2026, 14:18 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-5pr3-m5hm-9956
- OSV: GHSA-5pr3-m5hm-9956
- github.com/geoserver/geoserver/security/advisories/GHSA-5pr3-m5hm-9956
- nvd.nist.gov/vuln/detail/CVE-2023-43795
- docs.geoserver.org/latest/en/user/security/urlchecks.html
- docs.geoserver.org/stable/en/user/services/wps/security.html#complex-inputs
- github.com/geoserver/geoserver