CVE-2026-50221 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-50221MEDIUM

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-…

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   L   N   L   L   L    5.3   .0014    4.2     —

AFFECTED
  Product  Versions  Fixed
  Swift    2.0.0 –   —

TIMELINE
  Jun 4   Reserved by mitre
  Jun 23  EXPLOIT PUBLISHED — CVE-2026-50221 (OpenStack Swift). Public exploit reference added.
  Jun 23  Published (CNA: mitre)

CWE-918 · CNA: mitre · CVSS v4.0 · 4 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
June 4, 2026	Reserved	Reserved by mitre
June 23, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-50221 (OpenStack Swift). Public exploit reference added.
June 23, 2026	Published	Published (CNA: mitre)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
OpenStack	Swift	—	2.0.0	—

Weaknesses

CWE-918

References (4)

http://www.openwall.com/lists/oss-security/2026/06/23/5 [Mailing List, Patch, Third Party Advisory]
https://launchpad.net/bugs/2150261 [Exploit, Issue Tracking, Vendor Advisory]
https://security.openstack.org/ossa/OSSA-2026-024.html [Patch, Vendor Advisory]
https://www.openwall.com/lists/oss-security/2026/06/23/5 [Mailing List, Patch, Third Party Advisory]

Authoritative record: CVE-2026-50221 at cve.org

Vendors: openstack

Weaknesses: CWE-918

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-50221 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.