CVE-2026-15378
Blind SSRF in guardrails-detectors via crafted XSD allowing access to internal/cloud metadata
Is CVE-2026-15378 being exploited?
Not confirmed. CVE-2026-15378 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.53% probability of exploitation in the next 30 days.
How severe is CVE-2026-15378?
CVE-2026-15378 is rated Critical with a CVSS score of 9.3. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-15378?
Yes. A fix has been recorded for CVE-2026-15378. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-15378 affect?
CVE-2026-15378 affects guardrails-detectors, Kubernetes clusters running guardrails-detectors, Cloud metadata services (AWS/GCP/Azure), Kubernetes API servers, and 3 further products or versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-15378?
Remove/disable or patch guardrails-detectors; block egress to metadata/internal APIs; restrict input parsing and rotate exposed secrets.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote blind SSRF enables access to cloud metadata, Kubernetes API, MinIO, internal endpoints and local file reads (service account tokens, pod secrets).
Immediate action required