Improper Verification of Cryptographic Signature Affecting incus package, versions <7.0.1-5


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.18% (8th percentile)

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  • Snyk IDSNYK-DEBIAN14-INCUS-21479347
  • published23 Oct 2026
  • disclosed22 Oct 2026

Introduced: 22 Oct 2026

NewCVE-2026-115374  (opens in a new tab)
CWE-347  (opens in a new tab)

How to fix?

Upgrade Debian:14 incus to version 7.0.1-5 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream incus package and not the incus package as distributed by Debian. See How to fix? for Debian:14 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1