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Advisory record · GHSA-8gw4-p4wq-4hcv

Incus has Blind SSRF via Image Import Preflight HEAD

CVSS 5.3 MediumEPSS 0.0027 · 19th percentile

Published by the GitHub Advisory Database at 4 May 2026, 16:53 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/lxc/incus/v6/cmd/incusdGo<7.0.07.0.0
Identifiers
GHSA-8gw4-p4wq-4hcv · CVE-2026-35527 · GO-2026-5254
Weakness (CWE)
CWE-918
Tags
Published
4 May 2026
Updated
25 Jun 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Incus versions before 7.0.0 are affected. An authenticated user in a project with the restricted.images.servers restriction can still make the Incus daemon send HEAD requests to arbitrary URLs during an image import, before the restriction rejects the import. This allows blind server-side request forgery against internal services or cloud metadata endpoints reachable by the host. Upgrade to Incus 7.0.0 or later. The source gives few details on any workaround.

Written 7 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
5.3 Medium 4.0 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 CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0027, the 19th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:07 UTC First seen by agentprime
  2. 31 Oct 2026, 15:07 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.