CVE-2026-115374

{
  "etk_id": "ETK-2026-3040",
  "cve_id": "CVE-2026-115374",
  "display_id": "CVE-2026-115374",
  "ghsa_id": "GHSA-m6pj-594x-rw4f",
  "euvd_id": "EUVD-2026-108297",
  "status": "published",
  "anchor_state": "anchored",
  "title": "S3 signature validation bypass in incusd",
  "summary": "Incus's built-in S3 server can accept x-amz request headers that are not protected by signature validation. An attacker with a presigned upload URL may copy other objects from the same bucket to the authorized object key and potentially read their contents. This requires access to a presigned URL and an enabled built-in S3 bucket listener.",
  "mitigation": "Upgrade github.com/lxc/incus/v7/cmd/incusd to >= v7.5.0 or later.",
  "vendor": "go",
  "product": "go:github.com/lxc/incus/v7/cmd/incusd",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "< v7.5.0"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        ">= v7.5.0"
      ],
      "package_name": "github.com/lxc/incus/v7/cmd/incusd",
      "purl": "pkg:golang/github.com/lxc/incus/v7/cmd/incusd"
    }
  ],
  "cwes": [
    347
  ],
  "cvss_score": 7.1,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 31.247654183333335,
  "t0_at": "2026-10-22T19:13:43.999000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-22T19:13:43.999000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-22T19:13:43.999000+00:00",
      "url": "https://github.com/lxc/incus/security/advisories/GHSA-mmj7-8rgf-mx2h"
    }
  }
}