Input validation error in Glance - CVE-2026-34881
Published: April 28, 2026
Vulnerability identifier: #VU128271
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Green
CVE-ID: CVE-2026-34881
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Openstack
Affected software:
Glance
Glance
Detailed vulnerability description
The vulnerability allows a remote user to access internal services.
The vulnerability exists due to improper input validation in the web-download import method when following HTTP redirects. A remote user can provide a URL that passes validation and redirects to an internal or disallowed resource to access internal services.
Only the glance image import functionality is affected.
How to mitigate CVE-2026-34881
Install security update from vendor's website.