TI-2026-49871 Aliases CVE-2026-71191 GHSA-hqwm-h3rj-hvcf

Incorrect authorization in OpenStack Swift

LOW 28CWE-863Published 2026-08-05 · Updated 2026-08-06

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: Present
Impact type: Security bypass
Confidentiality · integrity · availability: High · None · None
Fix status: Partial Red Hat: 4 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-863.

Summary

In OpenStack Swift through 2.38.0, S3API middleware does not enforce that semantic x-amz-* headers are covered by the SigV4 signature on presigned URL requests. An attacker who obtains a presigned PUT URL can inject an unsigned X-Amz-Copy-Source header, causing Swift to perform a server-side copy from an arbitrary source object using the signer's authorization context. The attacker can read any object the signer has access to, provided the target project_id, container name, and object name are known. This affects all deployments using the default s3_acl=false configuration.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00564 47th percentileScored 2026-11-07

Fix Partial Swift (OpenStack): 2.35.4, 2.36.3, 2.37.3Red Hat: 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
OpenStack	Swift	2.18.0 to before 2.35.4; 2.36.0 to before 2.36.3; 2.37.0 to before 2.37.3; 2.38.0	2.35.4, 2.36.3, 2.37.3	Patch available	CNA

Swift VendorOpenStack Affected 2.18.0 to before 2.35.4; 2.36.0 to before 2.36.3; 2.37.0 to before 2.37.3; 2.38.0 Fixed in 2.35.4, 2.36.3, 2.37.3 Patch available CNA

Remediation

Fix · CNA Swift (OpenStack) Fixed in 2.35.4, 2.36.3, 2.37.3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Advisory · 2026-08-05
OpenStack Swift — openwall.com/lists/oss-security/2026/07/28/26
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2026-49872 Incorrect authorization in OpenStack SwiftPriority LOW 27
Show all 2 records → Advisory →
Advisory · 2026-08-05
OpenStack Swift — security.openstack.org/ossa/OSSA-2026-030.html
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2026-49872 Incorrect authorization in OpenStack SwiftPriority LOW 27
Show all 2 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat OpenStack Platform 13 (Queens)	Affected	No fix planned: Will not fix
Red Hat OpenStack Platform 16.2	Affected	No fix yet
Red Hat OpenStack Platform 17.1	Affected	No fix yet
Red Hat OpenStack Platform 18.0	Affected	No fix yet

Timeline

2026-10-02 Threatist record created from CVE-2026-71191
2026-10-03 Alias added: GHSA-hqwm-h3rj-hvcf

References

Advisory 2

Other 1

https://launchpad.net/bugs/2158733

TI-2026-78562 Incorrect authorization in OpenStack Manila share operations CVSS 3.1CRITICAL 9.9
TI-2026-63467 Code injection in OpenStack Octavia CVSS 4.0CRITICAL 9.4
TI-2017-13226 The tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c in the Linux kernel before… CVSS 3.1CRITICAL 9.8
TI-2026-69629 OpenStack Mistral flaw lets users change other projects' resources CVSS 4.0HIGH 7.2
TI-2026-69623 Command injection in OpenStack Mistral std.ssh_proxied action CVSS 4.0HIGH 8.7
TI-2022-17779 Improper privilege management in OpenStack CVSS 3.1HIGH 8.8

See all 332 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences