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OpenStack Glance CVE-2026-71196

CRITICAL
2026-09-03
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Severity by source

vuln.today AI
7.7 HIGH

Authenticated tenant user (PR:L) triggers via network API; scope changes as Glance fetches internal resources; full-read SSRF yields C:H with no integrity or confirmed availability impact.

3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
Red Hat
7.7 HIGH
qualitative

Lifecycle Timeline

2
Analysis Generated
Sep 03, 2026 - 18:20 vuln.today
CVE Published
Sep 03, 2026 - 16:14 oss-security
CRITICAL

Description PRE-NVD

Disclosed via oss-security. NVD scoring and full description are pending.

AnalysisAI

Server-side request forgery in OpenStack Glance 16.0.0 through 32.0.0 allows authenticated tenant users to make the image service fetch arbitrary internal URLs, including cloud metadata endpoints at 169.254.169.254, turning the image import pipeline into a full-read SSRF channel. Three related flaws (CVE-2026-71196, CVE-2026-71197, CVE-2026-71198) stem from insecure default host filtering in the web-download import method, a DNS rebinding bypass that evades the validator, and absent host filtering in the HTTP image location API respectively. …

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Vulnerability AssessmentAI

Exploitation Exploitation requires a valid OpenStack user account with image-create and image-import permissions, which is granted to any standard tenant user in a default multi-tenant deployment - unauthenticated exploitation is not possible. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment Real-world risk is high for any multi-tenant OpenStack deployment where tenant users cannot be fully trusted. … 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 Apply the full patch sets published under OSSA-2026-038: all four interdependent commits per release branch must be applied together and in the listed order, 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 running versions 16.0.0-32.0.0, disable the web-download and HTTP image-location import methods if operationally feasible, and restrict tenant image-import capabilities to trusted accounts only. …

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CVE-2026-71196 vulnerability details – vuln.today

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