Bug 2560124

Summary: CVE-2026-115374 incus: incus: Information disclosure via unsigned headers in presigned S3 URLs [fedora-rawhide]
Product: [Fedora] Fedora Reporter: Srikanth Balasubramanian <sbalasub>
Component: incusAssignee: Neal Gompa <ngompa13>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: dherrerace, fabian, go-sig, jonathan, ngompa13, rcallicotte, reto.gantenbein
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["ca19fbb9-e76c-4a33-9c56-255c1d8ba1b5"]}
Fixed In Version: Doc Type: ---
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Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2559371    

Description Srikanth Balasubramanian 2026-10-23 17:44:36 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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.