CVE-2026-50221: Swift OpenStack Swift Vulnerable To Authenticated Vulnerability

MODERATE
Advisory Identifier: GHSA-h8rc-w822-q8vq
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CVSS 5.4
CWE-918
Published
Advisory Summary

CVE-2026-50221 is a MODERATE (CVSS 5.4) openstack swift vulnerable to authenticated vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) affecting Swift libraries in the PyPI ecosystem. The issue involves openstack swift vulnerable to authenticated server-side request forgery. Remediation is available by upgrading affected packages to version 2.37.2.

CVE-2026-50221 at a Glance

CVE Identifier CVE-2026-50221
GHSA Identifier GHSA-h8rc-w822-q8vq
Severity MODERATE
CVSS v3.1 Base Score 5.4
CWE Classification CWE-918: Server-Side Request Forgery (SSRF)
Affected Product Swift
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 5.4

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2026-50221

To remediate this vulnerability, upgrade all affected Swift dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

swift fixed: 2.37.2 
pip install swift>=2.37.2
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show swift

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-50221, inspect your installed packages using pip:

pip show swift

Analyze the terminal output to locate any version of Swift in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.37.2), your application is affected.

Note: The pip show swift command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-918: Server-Side Request Forgery (SSRF), where the web server receives a url or similar request from an upstream component and retrieves the contents of this url, but it does not sufficiently ensure that the request is being sent to the expected destination. In Swift, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2026-50221 Affected Swift Versions

1 component(s)
Fixed Versions:
2.37.2
Product / Package Ecosystem Affected Versions Fixed Version
swift
pypi/swift
PyPI
< 2.37.2
2.37.2

References

NVD — CVE-2026-50221 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-50221
Security Fix Commit FIX COMMIT
https://github.com/openstack/swift/commit/75b050fdb1d1a6096f3765faa3b2059e28065d13
launchpad.net/bugs/2150261 WEB
https://launchpad.net/bugs/2150261
opendev.org/openstack/swift/com... WEB
https://opendev.org/openstack/swift/commit/75b050fdb1d1a6096f3765faa3b2059e28065d13
Swift Security Information SECURITY
https://security.openstack.org/ossa/OSSA-2026-024.html
Swift Security Information SECURITY
https://www.openwall.com/lists/oss-security/2026/06/23/5
Swift Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/06/23/5

Frequently Asked Questions

What is CVE-2026-50221?
CVE-2026-50221 is a security vulnerability in Swift involving OpenStack Swift vulnerable to authenticated server-side request forgery under CWE-918: Server-Side Request Forgery (SSRF).
Which Swift versions are affected?
Affected versions include releases prior to 2.37.2 across affected packages: swift.
What version fixes CVE-2026-50221?
Upgrading to 2.37.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is swift affected?
Yes, swift is affected in releases prior to 2.37.2. Upgrade your dependency to 2.37.2 or later.
What is the CVSS score of CVE-2026-50221?
CVE-2026-50221 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
What CWE is associated with CVE-2026-50221?
CVE-2026-50221 is classified under CWE-918: Server-Side Request Forgery (SSRF) (The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.).
How can I check PyPI dependencies for CVE-2026-50221?
Run the dependency tree command: 'pip show swift'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-h8rc-w822-q8vq",
  "modified" : "2026-09-24T19:02:20Z",
  "published" : "2026-06-23T18:31:44Z",
  "aliases" : [ "CVE-2026-50221" ],
  "summary" : "OpenStack Swift vulnerable to authenticated server-side request forgery",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "swift"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.37.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-50221"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openstack/swift/commit/75b050fdb1d1a6096f3765faa3b2059e28065d13"
  }, {
    "type" : "WEB",
    "url" : "https://launchpad.net/bugs/2150261"
  }, {
    "type" : "WEB",
    "url" : "https://opendev.org/openstack/swift/commit/75b050fdb1d1a6096f3765faa3b2059e28065d13"
  }, {
    "type" : "WEB",
    "url" : "https://security.openstack.org/ossa/OSSA-2026-024.html"
  }, {
    "type" : "WEB",
    "url" : "https://www.openwall.com/lists/oss-security/2026/06/23/5"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/06/23/5"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-918" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-24T19:02:19Z",
    "nvd_published_at" : "2026-06-23T18:18:04Z"
  }
}