Severity by source
DNS rebinding requires attacker-controlled DNS and timing precision (AC:H); any authenticated tenant qualifies (PR:L); scope changes as Glance fetches internal systems (S:C); exfiltration of metadata credentials drives C:H with no write or availability impact.
Lifecycle Timeline
2Description PRE-NVD
Articles & Coverage 1
AnalysisAI
DNS rebinding bypass in OpenStack Glance's web-download URI validator allows authenticated tenant users to circumvent host-filter restrictions and force the image service to fetch arbitrary internal URLs, enabling full-read SSRF exfiltration via the image download API. The validator evaluates host filters against the raw pre-resolution hostname, creating a TOCTOU window: an attacker's domain passes the check resolving to a legitimate external IP, then DNS rebinding redirects the actual fetch to internal targets such as the cloud instance metadata service at 169.254.169.254. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an authenticated OpenStack user account with image import permissions (any standard tenant user in a default configuration qualifies). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world risk is elevated for OpenStack multi-tenant environments where untrusted tenant users exist. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade OpenStack Glance to version 30.2.1 (2025.1/epoxy), 31.1.1 (2025.2/flamingo), or 32.0.1 (2026.1/gazpacho) by applying all four interdependent Gerrit patch sets for the applicable branch in the order listed in the advisory (review.opendev.org/1003822-1003825 for epoxy, 1003816-1003819 for flamingo, 1003812-1003815 for gazpacho); the commits must be applied together as each builds on the previous. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all OpenStack Glance deployments and determine which are running affected versions (16.0.0-30.2.0, 31.0.0-31.1.0, or 32.0.0); assess whether multi-tenant isolation is a compliance requirement and review Glance access logs for image-download requests targeting internal IP ranges. …
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