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CVE-2026-50221

OpenStack Swift vulnerable to authenticated server-side request forgery

5.3 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
Low
Availability
Low

Exploit likelihood

0.22%Unchanged since Jun 24, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.3

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.

Record
CVE-2026-50221
CVSS 4.0
5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:N
Weakness
CWE-918
Updated
2026-11-02
EUVDEUVD-2026-38537 5.3

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.

Record
EUVD-2026-38537
CVSS 4.0
5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-h8rc-w822-q8vq 5.3

OpenStack Swift vulnerable to authenticated server-side request forgery

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.

Record
GHSA-h8rc-w822-q8vq
CVSS 4.0
5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:N
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Weakness
CWE-918
Updated
2026-11-02
NVD 5.3

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.

Record
CVE-2026-50221
CVSS 4.0
5.3 MediumCVSS: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
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Weakness
CWE-918
Updated
2026-11-02
OSV 5.3

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.

Record
CVE-2026-50221
CVSS 4.0
5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:N
Weakness
CWE-918
Updated
2026-11-02
OSVDEBIAN-CVE-2026-50221 5.4

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.

Record
DEBIAN-CVE-2026-50221
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Updated
2026-11-02
OSVGHSA-h8rc-w822-q8vq 5.3

OpenStack Swift vulnerable to authenticated server-side request forgery

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.

Record
GHSA-h8rc-w822-q8vq
CVSS 4.0
5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:N
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Weakness
CWE-918
Updated
2026-11-02
OSVPYSEC-2026-4173 5.3

OpenStack Swift vulnerable to authenticated server-side request forgery

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.

Record
PYSEC-2026-4173
CVSS 4.0
5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:N
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2026-50221 5.3

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.

Record
UBUNTU-CVE-2026-50221
CVSS 4.0
5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:N
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
swift
PyPI
before 2.37.2
2.37.2
swift
Debian:12
before 2.30.1-0+deb12u2, plus listed versions
2.30.0-42.30.1-0+deb12u1
2.30.1-0+deb12u2
swift
Debian:13
before 2.35.1-0+deb13u3, plus listed versions
2.35.0-42.35.1-0+deb13u12.35.1-0+deb13u2
2.35.1-0+deb13u3
swift
Debian:14
before 2.37.1-5, plus listed versions
2.35.0-42.35.1-12.35.1-22.36.0-12.36.0-2
Show 11 moreShow less
2.36.0-32.36.0-42.36.0-52.36.0-62.36.0-72.36.0-82.37.0-12.37.1-12.37.1-22.37.1-32.37.1-4
2.37.1-5
swift
PyPI
before 2.37.2, plus listed versions
1.0.22.15.22.17.12.19.12.19.2
Show 41 moreShow less
2.20.02.21.02.21.12.22.02.23.02.23.12.23.22.23.32.24.02.25.02.25.12.25.22.26.02.27.02.28.02.28.12.29.02.29.12.29.22.30.02.30.12.31.02.31.12.32.02.32.12.33.02.33.12.34.02.34.12.34.22.35.02.35.12.35.22.35.32.35.42.36.02.36.12.36.22.36.32.37.02.37.1
2.37.2
swift
PyPI
before 2.37.2, plus listed versions
1.0.22.15.22.17.12.19.12.19.2
Show 43 moreShow less
2.20.02.21.02.21.12.22.02.23.02.23.12.23.22.23.32.24.02.25.02.25.12.25.22.26.02.27.02.28.02.28.12.29.02.29.12.29.22.30.02.30.12.31.02.31.12.32.02.32.12.33.02.33.12.34.02.34.12.34.22.35.02.35.12.35.22.35.32.35.42.35.52.36.02.36.12.36.22.36.32.36.42.37.02.37.1
2.37.2
swift
Ubuntu:16.04:LTS
All versions, plus listed versions
2.5.0-0ubuntu12.7.0-0ubuntu22.7.0-0ubuntu2.12.7.1-0ubuntu12.7.1-0ubuntu2
None known
swift
Ubuntu:18.04:LTS
All versions, plus listed versions
2.15.1-0ubuntu32.16.0-0ubuntu12.16.0-0ubuntu22.17.0-0ubuntu12.17.1-0ubuntu1
None known
swift
Ubuntu:20.04:LTS
All versions, plus listed versions
2.23.0-0ubuntu12.23.1-0ubuntu12.24.0~git2019121715.e890b0f0f-0ubuntu12.24.0-0ubuntu12.24.1~git2020032711.712bf3c9f-0ubuntu2
Show 5 moreShow less
2.24.1~git2020041316.a495f1e32-0ubuntu12.25.0-0ubuntu0.20.04.12.25.1-0ubuntu12.25.2-0ubuntu12.25.2-0ubuntu1.1
None known
swift
Ubuntu:22.04:LTS
All versions, plus listed versions
2.28.0+git2021090911.5d52afbe4-0ubuntu12.28.0+git2021120815.1859f2e16-0ubuntu12.28.0+git2021121320.876377435-0ubuntu12.28.0+git2022011309.32da73f5c-0ubuntu12.29.0+git2022030314.3ff3076ce-0ubuntu1
Show 4 moreShow less
2.29.0+git2022030314.3ff3076ce-0ubuntu22.29.1-0ubuntu12.29.2-0ubuntu12.29.2-0ubuntu1.1
None known
Show 4 moreShow less
Affected packages
PackageAffectedFixed
swift
Ubuntu:24.04:LTS
All versions, plus listed versions
2.32.0+git2023090714.8ce961ed-0ubuntu12.32.0+git2024021508.3aba22fd-0ubuntu12.32.0+git2024030809.4135133a-0ubuntu12.33.0-0ubuntu12.33.0-0ubuntu1.1
None known
swift
Ubuntu:25.10
All versions, plus listed versions
2.35.0-0ubuntu12.35.0+git2025070714.1428eb3b5-0ubuntu12.36.0-0ubuntu12.36.0-0ubuntu1.1
None known
swift
Ubuntu:26.10
All versions, plus listed versions
2.37.1-0ubuntu22.38.0+git20260812.91.3064444-0ubuntu12.38.1-0ubuntu12.38.2-0ubuntu1
None known
swift
Ubuntu:26.04:LTS
All versions, plus listed versions
2.36.0-0ubuntu12.37.0-0ubuntu12.37.1-0ubuntu22.37.1-0ubuntu2.1
None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-50221 is a medium vulnerability (CVSS 5.3) in Openstack Swift, published June 23, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.22%, the 12th percentile. Fixed in swift 2.37.2.

References

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