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CVE-2026-115374

7.1, high

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…

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7.1, high high CVSS v3.1
EPSS, next 30 days
n/a
Exploitation
No public evidence
Published
22 Oct 2026yesterday

Description

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.

Details

Vendor
LXC
Product
incus
Weakness
CWE-347 (opens in a new tab)
Status
Received
Updated
22 Oct 2026
Assigner
disclosure@vulncheck.com

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

References 2

Advisories 1

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other LXC CVEs

Every LXC CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-115375 LXC incus Path Traversal Vulnerability 9.9, critical
  • CVE-2026-115377 LXC incus Link Following Vulnerability 9.9, critical
  • CVE-2026-115371 LXC incus Insufficiently Protected Credentials Vulnerability 7.1, high
  • CVE-2026-115372 Incus from 7.3.0 before 7.5.0 contains a project restriction bypass that allows restricted project users to set block.create_options… 8.5, high
  • CVE-2026-115376 LXC incus Improper Access Control Vulnerability 7.7, high

Beyond this page

Is CVE-2026-115374 in your network?

This page tells you how dangerous CVE-2026-115374 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 23 Oct 2026, not the live upstream state.