CVE-2026-50221

MEDIUM EPSS 9.9%

Published Jun 23, 20266d ago · Modified Jun 23, 20266d ago

5.3 CVSS 4.0

Medium

Published Jun 23, 2026 6d ago

Last Modified Jun 23, 2026 6d ago

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 Details

Base Score

5.3

Exploitability

—

Impact

—

Vector string

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

Attack Vector Network

Attack Complexity Low

Privileges Required Low

User Interaction None

Scope X

Threat Intelligence

EPSS Exploit Probability

9.9% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-918 Server-Side Request Forgery (SSRF) Validation

References 4

openwall.com http://www.openwall.com/lists/oss-security/2026/06/23/5
launchpad.net https://launchpad.net/bugs/2150261
security.openstack.org https://security.openstack.org/ossa/OSSA-2026-024.html
openwall.com https://www.openwall.com/lists/oss-security/2026/06/23/5

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.