CVE-2026-35527
Incus has Blind SSRF via Image Import Preflight HEAD in github.com/lxc/incus
描述
Incus is an open source container and virtual machine manager. In versions prior to 7.0.0, the image import flow issues an outbound HEAD request to a user-supplied URL before validating the request against project restrictions such as restricted.images.servers. The imgPostURLInfo function constructs and sends a HEAD request directly from the attacker-supplied source URL to resolve image metadata, and this network interaction occurs before the flow reaches the point where the import would be rejected by policy. Although the actual image download is blocked by the project restriction, an authenticated user can coerce the daemon into making blind HEAD requests to arbitrary destinations. These requests include server metadata in custom headers (Incus-Server-Architectures, Incus-Server-Version), which discloses information about the host environment to the attacker-controlled endpoint. This blind SSRF primitive can be used to probe internal services, unroutable address space, or cloud metadata endpoints reachable from the host. This vulnerability pattern is similar to CVE-2026-24767. This issue has been fixed in version 7.0.0.
如何修補 CVE-2026-35527
要修補 CVE-2026-35527,請將受影響套件升級到下列已修補版本。
- —升級至 7.0.0-1 或更新版本
- —未列出修補版本
- —未列出修補版本
- —升級至 7.0.0 或更新版本
- —升級至 7.0.0 或更新版本
CVE-2026-35527 正在被利用嗎?
低 — EPSS 為 0.3%,目前沒有觀察到大規模利用活動。