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.
Metrics
Affected Vendors & Products
References
History
Tue, 29 Sep 2026 13:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Title | Swift TempURL Exploit Enables Unauthorized Copy via X‑Copy‑From Header | openstack-swift: openstack-swift: unauthorized read of other objects via TempURL and X-Copy-From |
| Weaknesses | CWE-358 | |
| References |
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| Metrics |
threat_severity
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cvssV3_1
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Thu, 24 Sep 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| References |
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Thu, 24 Sep 2026 03:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Title | Swift TempURL Exploit Enables Unauthorized Copy via X‑Copy‑From Header |
Thu, 24 Sep 2026 02:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| First Time appeared |
Openstack
Openstack swift |
|
| Weaknesses | CWE-184 | |
| CPEs | cpe:2.3:a:openstack:swift:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Openstack
Openstack swift |
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| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: mitre
Published: 2026-09-24T02:25:49.093Z
Updated: 2026-10-06T17:42:19.236Z
Reserved: 2026-09-24T02:25:48.652Z
Link: CVE-2026-97149
No data.
Status : Awaiting Analysis
Published: 2026-09-24T03:16:59.133
Modified: 2026-10-06T18:16:59.117
Link: CVE-2026-97149