CVE-2026-50221
Last modified
CVE-2026-50221 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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. EPSS estimates a 0.20% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Openstack | Swift | >= 2.0.0, < 2.35.3 |
| Openstack | Swift | >= 2.36.0, < 2.36.2 |
| Openstack | Swift | >= 2.37.0, < 2.37.2 |
References
- https://launchpad.net/bugs/2150261Exploit, Issue Tracking, Vendor Advisory
- https://security.openstack.org/ossa/OSSA-2026-024.htmlPatch, Vendor Advisory
- https://www.openwall.com/lists/oss-security/2026/06/23/5Mailing List, Patch, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2026/06/23/5Mailing List, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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