CVE-2026-61612 json
@aborruso/ckan-mcp-server has SSRF via DNS-name → internal IP — incomplete fix of CVE-2026-53509
published 2026-09-21 48 d ago modified 2026-09-24 45 d ago also GHSA-798p-78g2-v556 , EUVD-2026-84031
- cvss
- 5.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 33%
- public exploits
- 0
- none known
Summary
CKAN MCP Server is a tool for querying CKAN open data portals. Prior to version 0.4.108, the SSRF guard `validateServerUrl` (added for CVE-2026-33060, extended for CVE-2026-53509) validates only the hostname string and never resolves DNS. Any caller-supplied `server_url` whose hostname *resolves* to an internal address passes the guard, so the server issues requests to loopback and cloud metadata (`169.254.169.254`). This is a third bypass of the same guard, and it reaches IMDS — strictly more than CVE-2026-53509, which only reached loopback. Version 0.4.108 contains an updated fix.
Patch / fix
- npm @aborruso/ckan-mcp-server 0.4.108
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 48 d ago
Exploit prediction
0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N |
| GitHub | 3.1 | 5.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | @aborruso/ckan-mcp-server | <0.4.108 |
0.4.108 |
Affected products
- ondata ckan-mcp-server
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
-
github.com
/ondata/ckan-mcp-server/commit/bb7439b553b9f965adc3d43bcd415c42eebe2f40
web
-
github.com
/ondata/ckan-mcp-server/security/advisories/GHSA-798p-78g2-v556
web
-
github.com
/advisories/GHSA-3xm7-qw7j-qc8v
advisory
-
github.com
/advisories/GHSA-g84h-j7jj-x32p
advisory
-
github.com
/ondata/ckan-mcp-server/releases/tag/v0.4.108
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-61612
advisory
-
github.com
/ondata/ckan-mcp-server
package
Sources
- CVE List CVE-2026-61612
- GitHub Advisory GHSA-798p-78g2-v556
- NVD CVE-2026-61612
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.