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CVE-2026-97149 - OpenStack Swift TempURL Middleware Unauthorized Object Access Vulnerability

CVE ID : CVE-2026-97149 Published : Sept. 24, 2026, 2:25 a. m. • 33 minutes ago Description : In OpenStack Swift before 2. 38. 2, the tempurl middleware does not reject the X-Copy-From header on PUT requests. A TempURL signature only covers the method, expiry, and path, and thus the list of disallowed headers is the only defense against a signed PUT request changing what the request does. An attacker holding a PUT TempURL for a single object can add an X-Copy-From header naming any object in the same account; the copy middleware copies that object to the destination, and the attacker then reads the victim's data back with a GET TempURL for the destination object. Copies across account boundaries are rejected. Only deployments using the shipped default proxy pipeline (tempurl and copy middleware) with account-level TempURL keys are affected. Severity: 5.3 • MEDIUM