CVE-2026-71192Network attack vectorHinoki check available

Cross-tenant object disclosure via unsanitized copy headers

Published Aug 5, 2026 · Updated Aug 5, 2026

Incorrect authorization in OpenStack Swift allows remote authenticated users to read cross-tenant objects through its S3API middleware. The middleware passes X-Copy-From and X-Copy-From-Account from a signed PUT to Swift after authorizing only the destination bucket, so the native copy reads the named source without checking its tenant ACL. Reachability requires the non-default s3_acl=true setting, valid S3 credentials, a writable destination bucket, and knowledge of the source project, container, and object names.

CVSS severity6.0
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Incorrect authorization in OpenStack Swift allows remote authenticated users to read cross-tenant objects through its S3API middleware. The middleware passes X-Copy-From and X-Copy-From-Account from a signed PUT to Swift after authorizing only the destination bucket, so the native copy reads the named source without checking its tenant ACL. Reachability requires the non-default s3_acl=true setting, valid S3 credentials, a writable destination bucket, and knowledge of the source project, container, and object names.

The record

CVE
CVE-2026-71192
Published
Aug 5, 2026
Updated
Aug 5, 2026
Vendor
OpenStack
Product
Swift
Classifications
CWE-863, T1530
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.18.0 <2.35.4
  2. Affected versionversion=2.36.0 <2.36.3
  3. Affected versionversion=2.37.0 <2.37.3
  4. Affected versionversion=2.38.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenStack · Swiftversion=2.18.0 <2.35.4; version=2.36.0 <2.36.3; version=2.37.0 <2.37.3; version=2.38.0

Published CVSS scores

6.0MITRECVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1530Data from Cloud Storage Object

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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