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CVE-2026-55864

Severity7.8 High CVSS 4.0
Fixed in4.4.12, 4.2.17
WeaknessServer-side request forgery (CWE-918)
Published15 Sep 2026
Updated30 Sep 2026

Published 2 months ago. NVD often adds the list of affected products days or weeks after a CVE is published, and the other sources we check lag too. The scope and status here may change.

Description

GeoNetwork is a catalog application to manage spatially referenced resources. Prior to 4.2.17 and 4.4.12, POST /api/tools/ogc/sld accepted a caller-supplied WMS server URL and performed a server-side HTTP GET without destination validation. An anonymous attacker could make the GeoNetwork server send requests to internal hosts that are not publicly reachable. When the outbound response was XML, the endpoint could store and return the fetched body, making the request forgery non-blind and enabling internal data disclosure, authorization bypass, and network reconnaissance. This issue is fixed in versions 4.2.17 and 4.4.12.

Exploitation status

Working exploit published

A reviewed exploit catalogue lists ready-to-run exploit code for this CVE.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: none
  • Indexed PoC 1 indexed Published artifacts you can open, in Nuclei.
  • EPSS 1.4% chance in 30 days
IndexArtifactStarsFirst seen
Nuclei GeoNetwork - Server-Side Request Forgery (SSRF)

Waratek protection

Mitigation candidate

A kind of vulnerability Waratek's rules address, with exploit code published or exploitation reported. No rule exists and none is planned yet. The decision below says what we found to build a rule from.

  • Protection none
  • Action unverified
  • Review automated Inferred
  • Record active
Decided by A reference pointing at the upstream fix: a commit, a PR, a Red Hat bug
Finding A reference points at an upstream fix (commit tier): https://github.com/geonetwork/core-geonetwork/commit/17fdae28a5a51996bf5ff7f7e8236332c74eab77. That makes this CVE a candidate for an ARMR patch rule — it is the kind of defect ARMR can address, and there is a fix to work from. No rule exists and none is scheduled: writing one means reading the linked change and finding a hook point ARMR can express it at, which may turn out not to exist.
Candidate fix https://github.com/geonetwork/core-geonetwork/commit/17fdae28a5a51996bf5ff7f7e8236332c74eab77 : a commit: the change itself

Affected software and releases

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
org.geonetwork-opensource:gn-web-app 4.4.0 4.4.12 unbounded
org.geonetwork-opensource:gn-web-app 4.0.0 4.2.17 unbounded

Products and versions

1 product, 2 version entries
SourceVendorProductSchemeAffected versions
osv org.geonetwork-opensource gn-web-app generic ≥ 4.0.0 and < 4.2.17 · ≥ 4.4.0 and < 4.4.12

References

URLTags
https://github.com/geonetwork/core-geonetwork/commit/17fdae28a5a51996bf5ff7f7e8236332c74eab77 commit
https://github.com/geonetwork/core-geonetwork/security/advisories/GHSA-5hx7-j24v-rffj WEB
https://github.com/geonetwork/core-geonetwork/pull/9343 WEB
https://github.com/geonetwork/core-geonetwork PACKAGE
https://github.com/geonetwork/core-geonetwork/commit/a80d535c842e6af589d0bac37e7fe4ba01193757
https://github.com/geonetwork/core-geonetwork/pull/9344
https://github.com/geonetwork/core-geonetwork/releases/tag/4.2.17
https://github.com/geonetwork/core-geonetwork/releases/tag/4.4.12

Timeline

Published2026-09-15By the CVE Program.
NVD record modified2026-09-30NVD's own last-modified date for this record.