TI-2026-49872 Aliases CVE-2026-71192 GHSA-6p2v-36c6-f6m5

Incorrect authorization in OpenStack Swift

LOW 27CWE-863Published 2026-08-05 · Updated 2026-08-05

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, the S3API middleware does not sanitize Swift-native control headers (X-Copy-From, X-Copy-From-Account) from S3 API requests when s3_acl=true. An attacker can inject these headers into a signed PUT request targeting their own bucket, causing Swift to perform a server-side copy from another tenant's private object. The source object authorization is bypassed because the S3API middleware has already authorized the request against the destination. The attacker can read any object whose project_id, container name, and object name are known, regardless of the source object's ACLs or ownership. This requires the non-default s3_acl=true configuration.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00439 38th 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-2026-49871 Incorrect authorization in OpenStack SwiftPriority LOW 28
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-2026-49871 Incorrect authorization in OpenStack SwiftPriority LOW 28
Show all 2 records → Advisory →

Vendor assessments

Red Hat

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

Product	Status	Plan or fix
Red Hat OpenStack Platform 13 (Queens)	Affected	No fix yet: Fix deferred
Red Hat OpenStack Platform 16.2	Affected	No fix yet: Fix deferred
Red Hat OpenStack Platform 17.1	Affected	No fix yet: Fix deferred
Red Hat OpenStack Platform 18.0	Affected	No fix yet: Fix deferred

Timeline

2026-10-02 Threatist record created from CVE-2026-71192
2026-10-03 Alias added: GHSA-6p2v-36c6-f6m5

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