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Vulnerability record · CVE-2026-50221 · published 23 June 2026

CVE-2026-50221: Openstack swift server-side request forgery (ssrf) vulnerability

Openstack · Swift

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.

5.3 CVSS 4.0 Medium EPSS 0.22% · top 89.1% CWE-918 · Server-side request forgery (SSRF)
5.3CVSS 4.0 base score
0.22%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 1 tagged exploit
29 Jun 2026Last modified by NVD

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: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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://launchpad.net/bugs/2150261 ExploitIssue TrackingVendor Advisory
https://security.openstack.org/ossa/OSSA-2026-024.html PatchVendor Advisory
https://www.openwall.com/lists/oss-security/2026/06/23/5 Mailing ListPatchThird Party Advisory
http://www.openwall.com/lists/oss-security/2026/06/23/5 Mailing ListPatchThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2017-16613Openstack swauth improper authentication vulnerabilityAn issue was discovered in middleware.py in OpenStack Swauth through 1.2.0 when used with OpenStack Swift through 2.15.1. The Swift object store and …EPSS 8.4%9.8CVE-2012-4406Openstack swift deserialization of untrusted data vulnerabilityOpenStack Object Storage (swift) before 1.7.0 uses the loads function in the pickle Python module unsafely when storing and loading metadata in memca…EPSS 6.6%7.5CVE-2016-0738Openstack swift vulnerabilityOpenStack Object Storage (Swift) before 2.3.1 (Kilo), 2.4.x, and 2.5.x before 2.5.1 (Liberty) do not properly close server connections, which allows …EPSS 3.9%7.5CVE-2016-0737Openstack swift vulnerabilityOpenStack Object Storage (Swift) before 2.4.0 does not properly close client connections, which allows remote attackers to cause a denial of service …EPSS 3.8%7.1CVE-2026-49017Openstack swift vulnerabilityIn OpenStack Swift before 2.36.2 and 2.37.2, s3api middleware enters an infinite loop when processing a truncated aws-chunked PUT request body. The S…EPSS 0.36%6.5CVE-2022-47950Openstack swift vulnerabilityAn issue was discovered in OpenStack Swift before 2.28.1, 2.29.x before 2.29.2, and 2.30.0. By supplying crafted XML files, an authenticated user may…EPSS 1.0%5.8CVE-2013-6396Openstack swift vulnerabilityThe OpenStack Python client library for Swift (python-swiftclient) 1.0 through 1.9.0 does not verify X.509 certificates from SSL servers, which allow…EPSS 0.74%5.5CVE-2015-1856Openstack swift permissions and access controls vulnerabilityOpenStack Object Storage (Swift) before 2.3.0, when allow_version is configured, allows remote authenticated users to delete the latest version of an…EPSS 4.0%

Source: NIST National Vulnerability Database (record CVE-2026-50221), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.