SSRF in Craftcms Cms
CVE-2026-72784
Craft CMS versions >= 5.0.0-RC1 before 5.10.6 and >= 4.0.0-RC1 before 4.18.2 contain a server-side request forgery vulnerability in the GraphQL save<Volume>Asset mutation, which fetches an attacker-supplied URL server-side. The anti-SSRF validation is incomplete: validateIp() does not cover CGNAT (100.64.0.0/10) or NAT64 (64:ff9b::/96) ranges, and the only IP check runs after the request has already been issued. An attacker holding a GraphQL token scoped only to asset-creation permissions can disclose internal HTTP content from CGNAT/NAT64 targets, force outbound GET requests to internal hosts (including RFC1918, loopback, and metadata endpoints), and enumerate internal services.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (13.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 13.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001
Affected products
- Craftcms Cms — versions 5.0.0-RC1, 5.10.6, 4.0.0-RC1
Weakness classification (CWE)
References
- github.com/craftcms/cms/security/advisories/GHSA-2mx8-9ww7-p27x (vendor-advisory)
- www.vulncheck.com/advisories/craft-cms-rc1-before-ssrf-via-graphql-asset-mutati… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-72784?
- CVE-2026-72784 is a medium-severity vulnerability in Craftcms Cms, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.4/10. Published 2026-08-11.
- How severe is CVE-2026-72784?
- Medium severity. CVSS v3 base score is 5.4 out of 10.