{"cve":"CVE-2026-35527","nvd":{"published":"2026-05-05T21:16:22.097","modified":"2026-07-24T21:10:00.143","status":"Analyzed","description":"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.\n\nThese 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.\n\nThis vulnerability pattern is similar to CVE-2026-24767. This issue has been fixed in version 7.0.0.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N","score":5.3},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N","score":5.0},"cwes":["CWE-918"],"references":["https://github.com/lxc/incus/blob/v6.22.0/cmd/incusd/images.go","https://github.com/lxc/incus/security/advisories/GHSA-8gw4-p4wq-4hcv","https://github.com/lxc/incus/security/advisories/GHSA-8gw4-p4wq-4hcv"],"products":["linuxcontainers:incus"],"source":"nvd","synced_at":"2026-10-19T22:33:55.586217763+00:00"},"epss":{"cve":"CVE-2026-35527","score":0.00271,"percentile":0.19547,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-8gw4-p4wq-4hcv","url":"https://osv.dev/vulnerability/GHSA-8gw4-p4wq-4hcv","summary":"Incus has Blind SSRF via Image Import Preflight HEAD","modified":"2026-06-25T19:56:12.272895674Z","packages":[{"ecosystem":"Go","name":"github.com/lxc/incus/v6/cmd/incusd","purl":"pkg:golang/github.com/lxc/incus/v6/cmd/incusd","ranges":["<7.0.0"],"fixed":["7.0.0"]}]},{"id":"GO-2026-5254","url":"https://osv.dev/vulnerability/GO-2026-5254","summary":"Incus has Blind SSRF via Image Import Preflight HEAD in github.com/lxc/incus","modified":"2026-06-25T19:45:20.725520239Z","packages":[{"ecosystem":"Go","name":"github.com/lxc/incus","purl":"pkg:golang/github.com/lxc/incus","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/lxc/incus/v6","purl":"pkg:golang/github.com/lxc/incus/v6","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/lxc/incus/v7","purl":"pkg:golang/github.com/lxc/incus/v7","ranges":["<7.0.0"],"fixed":["7.0.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}