AI security incident: Craft CMS has Cloud Metadata SSRF Protection Bypass via DNS Rebinding (GHSA-gp2f-7wcm...
Summary The SSRF validation in Craft CMS’s GraphQL Asset mutation performs DNS resolution **separately** from the HTTP request. This Time-of-Check-Time-of-Use (TOCTOU) vulnerability enables DNS rebinding attacks, where an attacker’s DNS server returns different IP addresses for validation compared to the actual request. This is a bypass of the security fix for CVE-2025-68437 ([GHSA-x27p-wfqw-hfcc](https://github.com/craftcms/cms/security/advisories/GHSA-x27p-wfqw-hfcc)) that allows access to all blocked IPs, not just IPv6 endpoints.
Why This Is AI-Related
This advisory is part of the public incident archive, but the current source material uses limited explicit AI terminology, so the cited sources should be reviewed carefully when judging AI relevance and exposure.
- Explicit AI-specific signals are limited in the current source material, so use the cited advisory to validate scope during triage.
Affected Workflow
Review connectors, retrieval plugins, webhook targets, file access paths, and outbound network policies around AI services.
Likely Attack Path
The flaw creates an unauthorized path to fetch, read, or exfiltrate sensitive data from connected systems or local files.
Impact
The flaw can expose internal data, local files, or connected systems through AI workflow connectors and supporting services. Severity HIGH. Classification confidence 80%. Source channel GHSA.
Detection And Triage Signals
- Unexpected outbound requests from AI application components
- Access to internal metadata endpoints, local files, or restricted datasets
- Downloads or responses that contain internal documents, secrets, or embeddings
Recommended Response
- Confirm whether the affected component can reach internal metadata, local files, or connected data stores.
- Restrict outbound requests and sensitive data access paths until a patch or mitigation is in place.
- Inspect logs for unusual downloads, webhook calls, retrieval requests, or responses containing internal content.
Compliance And Business Impact
Data exposure creates direct confidentiality risk and can trigger incident notification, contractual, and regulatory obligations.
Sources
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