CVE-2026-50221

MEDIUMNVD 5.45.4—
EchelonGraph scoreHIGH confidence

Score 5.4 from GitHub Security Advisory published 2026-06-23. NVD baseline CVSS 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
5.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.4Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
5.4
EG Score
5.4(high)
EPSS
4.2%
KEV
Not listed

Published

June 23, 2026

Last Modified

June 29, 2026

Advisory Details (4)

Auto-updated Jun 25, 2026
No patch confirmed yet.
generic

oss-security - [OSSA-2026-024] OpenStack Swift: Swift proxy-server SSRF via header injection (CVE-2026-50221)

http://www.openwall.com/lists/oss-security/2026/06/23/5
generic

oss-security - [OSSA-2026-024] OpenStack Swift: Swift proxy-server SSRF via header injection (CVE-2026-50221)

https://www.openwall.com/lists/oss-security/2026/06/23/5
generic

OSSA-2026-024: Swift proxy-server SSRF via header injection — OpenStack Security Advisories 0.0.1.dev348 documentation

https://security.openstack.org/ossa/OSSA-2026-024.html
generic

Bug #2150261 “[OSSA-2026-024] Swift proxy-server SSRF via header...” : Bugs : OpenStack Object Storage (swift)

https://launchpad.net/bugs/2150261

Vendor Advisories for CVE-2026-50221(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 17× in last 7d / 39× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 10:30 UTCEG score recompute
  2. 2026-07-06 10:29 UTCGHSA enrichment
  3. 2026-07-06 02:23 UTCEPSS rescore
  4. 2026-07-05 09:14 UTCEG score recompute
  5. 2026-07-05 09:14 UTCGHSA enrichment
  6. 2026-07-05 02:30 UTCEPSS rescore
  7. 2026-07-04 07:53 UTCEG score recompute
  8. 2026-07-04 07:53 UTCGHSA enrichment
  9. 2026-07-04 06:31 UTCEPSS rescore
  10. 2026-07-03 06:38 UTCEG score recompute
  11. 2026-07-03 06:38 UTCGHSA enrichment
  12. 2026-07-02 05:21 UTCEG score recompute
  13. 2026-07-02 05:21 UTCGHSA enrichment
  14. 2026-07-01 15:07 UTCEPSS rescore
  15. 2026-07-01 04:07 UTCEG score recompute
  16. 2026-07-01 04:07 UTCGHSA enrichment
  17. 2026-06-30 23:22 UTCEPSS rescore
  18. 2026-06-30 02:52 UTCEG score recompute▲ 0.10
  19. 2026-06-30 02:52 UTCGHSA enrichment
  20. 2026-06-30 00:20 UTCNVD updateCVSS v3 → 5.4
  21. 2026-06-29 14:06 UTCEPSS rescore
  22. 2026-06-29 14:06 UTCEPSS rescore
  23. 2026-06-29 01:37 UTCEG score recompute
  24. 2026-06-29 01:37 UTCGHSA enrichment
  25. 2026-06-28 14:07 UTCEPSS rescore
Show 14 more
  1. 2026-06-28 04:56 UTCEPSS rescore
  2. 2026-06-28 04:56 UTCEPSS rescore
  3. 2026-06-28 00:22 UTCEG score recompute
  4. 2026-06-28 00:22 UTCGHSA enrichment
  5. 2026-06-27 03:08 UTCEPSS rescore
  6. 2026-06-26 23:05 UTCEG score recompute
  7. 2026-06-26 23:05 UTCGHSA enrichment
  8. 2026-06-25 21:51 UTCEG score recompute▲ 5.30
  9. 2026-06-25 21:51 UTCGHSA enrichment
  10. 2026-06-25 21:50 UTCNVD updateCVSS v3 → 5.3 · CVSS v4 → 5.3
  11. 2026-06-25 13:49 UTCEPSS rescore
  12. 2026-06-24 14:05 UTCEPSS rescore
  13. 2026-06-23 19:21 UTCEG score recompute
  14. 2026-06-23 19:20 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-50221?
CVE-2026-50221 is a medium vulnerability published on June 23, 2026. 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…
When was CVE-2026-50221 disclosed?
CVE-2026-50221 was first published in the National Vulnerability Database on June 23, 2026, with the most recent update on June 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-50221 actively exploited?
CVE-2026-50221 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-50221?
CVE-2026-50221 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-50221?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-50221, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-50221

Explore →

Is Your Infrastructure Affected by CVE-2026-50221?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs