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Fencer Vulns
medium 5.3

CVE-2026-97149 json

In OpenStack Swift before 2.38.2, the tempurl middleware does not reject the X-Copy-From header on PUT requests.

published 2026-09-24 46 d ago modified 2026-10-06 33 d ago also EUVD-2026-85786

cvss
5.3
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 16%
public exploits
0
none known

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 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.

Patch / fix

  • OpenStack Swift 2.35.5, 2.36.4, 2.37.4, 2.38.2
  • swift Debian 12 2.30.1-0+deb12u3
  • swift Debian 13 2.35.1-0+deb13u4
  • swift Debian 14 2.38.1-3

debian advisories DEBIAN-CVE-2026-97149

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-97149 updated cvss 6.5

openstack-swift: openstack-swift: unauthorized read of other objects via TempURL and X-Copy-From

  • Red Hat OpenStack Platform 13 (Queens) python-swift, python-swift-tests, openstack-swift-proxy, openstack-swift-object, openstack-swift-account, openstack-swift-container
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat OpenStack Platform 16.2 python3-swift, openstack-swift, openstack-swift-proxy, openstack-swift-object, openstack-swift-account, openstack-swift-container Red Hat OpenStack Platform 17.1 python3-swift, openstack-swift, openstack-swift-proxy, openstack-swift-object, openstack-swift-account, openstack-swift-container Red Hat OpenStack Platform 18.0 openstack-swift
    affected: workaround, no fix available

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
33 d ago

Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 5.3 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
CNA 4.0 5.3 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/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

Affected products

  • OpenStack Swift

Classification

Weakness
  • CWE-184 Incomplete List of Disallowed Inputs

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.