Vulnerability Description
In OpenStack Swift before 2.37.2, proxy-server does not strip internal update headers (X-Container-Host, X-Container-Device, X-Delete-At-Host, X-Delete-At-Device) from client requests before forwarding them to object-servers. An authenticated user with write access can inject these headers to redirect container update requests to an attacker-controlled server, enabling server-side request forgery. The SSRF requests expose internal cluster metadata including storage policy indexes, partition mappings, device names, and when at rest encryption is enabled, cipher text and initialization vectors for the container-level encryption key. The attacker can also cause "ghost listings" in arbitrary containers via the shard-range redirect mechanism.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openstack | Swift | >= 2.0.0, < 2.35.3 |
Related Weaknesses (CWE)
References
- https://launchpad.net/bugs/2150261ExploitIssue TrackingVendor Advisory
- https://security.openstack.org/ossa/OSSA-2026-024.htmlPatchVendor Advisory
- https://www.openwall.com/lists/oss-security/2026/06/23/5Mailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2026/06/23/5Mailing ListPatchThird Party Advisory
FAQ
What is CVE-2026-50221?
CVE-2026-50221 is a vulnerability with a CVSS score of 5.4 (MEDIUM). In OpenStack Swift before 2.37.2, proxy-server does not strip internal update headers (X-Container-Host, X-Container-Device, X-Delete-At-Host, X-Delete-At-Device) from client requests before forwardin...
How severe is CVE-2026-50221?
CVE-2026-50221 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-50221?
Check the references section above for vendor advisories and patch information. Affected products include: Openstack Swift.