CVE-2026-115374
Published:October 22, 2026
Updated:October 23, 2026
Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 contains a signature verification flaw in its built-in S3 server that allows presigned URL holders to inject unsigned x-amz-* headers. Attackers can add an unsigned X-Amz-Copy-Source header to a presigned upload URL to copy other bucket objects onto the granted key, disclosing their contents and ETags.
Affected Packages
https://github.com/lxc/incus.git (GITHUB):
Affected version(s) =v7.0.1 <v7.0.2Fix Suggestion:
Update to version v7.0.2https://github.com/lxc/incus.git (GITHUB):
Affected version(s) >=v7.1.0 <v7.5.0Fix Suggestion:
Update to version v7.5.0github.com/lxc/incus/v7 (GO):
Affected version(s) =v7.0.1 <v7.0.2Fix Suggestion:
Update to version v7.0.2github.com/lxc/incus/v7 (GO):
Affected version(s) >=v7.1.0 <v7.5.0Fix Suggestion:
Update to version v7.5.0Related Resources (2)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Verification of Cryptographic Signature