Vulnerability · Published Sep 24, 2026 · Assigned by mitre
CVE-2026-97149
Medium 5.3
In plain English
A medium-severity security flaw in Swift from OpenStack. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | swift | 2.30.1-0+deb12u3 | DEBIAN-CVE-2026-97149 |
| Debian:13 | swift | 2.35.1-0+deb13u4 | DEBIAN-CVE-2026-97149 |
| Debian:14 | swift | 2.38.1-3 | DEBIAN-CVE-2026-97149 |
| Ubuntu:22.04:LTS | swift | no fix listed | UBUNTU-CVE-2026-97149 |
| Ubuntu:24.04:LTS | swift | no fix listed | UBUNTU-CVE-2026-97149 |
| Ubuntu:26.04:LTS | swift | no fix listed | UBUNTU-CVE-2026-97149 |
| Ubuntu:26.10 | swift | no fix listed | UBUNTU-CVE-2026-97149 |
Affected products (as reported)
Weakness: CWE-184 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N