---
id: CVE-2026-97149
title: >-
  In OpenStack Swift before 2.38.2, the tempurl middleware does not reject the
  X-Copy-From header on PUT requests
summary: >-
  In OpenStack Swift before 2.38.2, the tempurl middleware does not reject the
  X-Copy-From header on PUT requests. A TempURL signature only covers the
  method, expiry, and path, and thus the list of disallowed headers is the only
  defense ag…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'
cwe:
  - CWE-184
  - CWE-358
vendor: OpenStack
product: Swift
affected:
  - Swift >= 2.4.0 < 2.35.5
  - Swift >= 2.36.0 < 2.36.4
  - Swift >= 2.37.0 < 2.37.4
  - Swift >= 2.38.0 < 2.38.2
published: '2026-09-24'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T18:16:59.117'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97149'
references:
  - url: 'https://launchpad.net/bugs/2166876'
    label: cve@mitre.org
  - url: 'http://www.openwall.com/lists/oss-security/2026/09/24/5'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97149.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-97149'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2539886'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-97149'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97149'
  - url: 'https://security.openstack.org/ossa/OSSA-2026-041.html'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00248
epssPercentile: 0.15997
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-06T15:53:29.868605Z'
cvssSource: cna
scores:
  cna: 5.3
  vendor: 6.5
ingestedAt: '2026-09-24T02:36:46.281Z'
---

## Overview

In OpenStack Swift before 2.38.2, the tempurl middleware does not reject the X-Copy-From header on PUT requests. A TempURL signature only covers the method, expiry, and path, and thus the list of disallowed headers is the only defense against a signed PUT request changing what the request does. An attacker holding a PUT TempURL for a single object can add an X-Copy-From header naming any object in the same account; the copy middleware copies that object to the destination, and the attacker then reads the victim's data back with a GET TempURL for the destination object. Copies across account boundaries are rejected. Only deployments using the shipped default proxy pipeline (tempurl and copy middleware) with account-level TempURL keys are affected.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat OpenStack Platform 13 (Queens), Red Hat OpenStack Platform 16.2, Red Hat OpenStack Platform 17.1, Red Hat OpenStack Platform 18.0 · no fix planned: Red Hat OpenStack Platform 13 (Queens), Red Hat OpenStack Platform 16.2, Red Hat OpenStack Platform 17.1, Red Hat OpenStack Platform 18.0 · updated 2026-09-29 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97149.json)