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TI-2026-19296 Aliases CVE-2026-23954GHSA-7f67-crqm-jgh7

Incus container image templating arbitrary host file read and write

Priority HIGH 73CWE-22Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

Incus is a system container and virtual machine manager. Versions 6.21.0 and below allow a user with the ability to launch a container with a custom image (e.g a member of the ‘incus’ group) to use directory traversal or symbolic links in the templating functionality to achieve host arbitrary file read, and host arbitrary file write. This ultimately results in arbitrary command execution on the host. When using an image with a metadata.yaml containing templates, both the source and target paths are not checked for symbolic links or directory traversal. This can also be exploited in IncusOS. A fix is planned for versions 6.0.6 and 6.21.0, but they have not been released at the time of publication.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00781 56th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
lxcincus6.1.0 – 6.20.0; up to 6.0.5—No fix listedCNA
—github.com/lxc/incus/v6/cmd/incusd (Go)all versions—No fix listedGHSA-7f67-crqm-jgh7
  • incus Vendorlxc Affected 6.1.0 – 6.20.0; up to 6.0.5 Fixed in — No fix listed CNA
  • github.com/lxc/incus/v6/cmd/incusd (Go) Vendor— Affected all versions Fixed in — No fix listed GHSA-7f67-crqm-jgh7

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:linuxcontainers:incus:*:*:*:*:*:*:*:*up to 6.0.5; 6.1.0 to before 6.21.0Vulnerablelxc
  • cpe:2.3:a:linuxcontainers:incus:*:*:*:*:*:*:*:* Versions up to 6.0.5; 6.1.0 to before 6.21.0 Vulnerable ·lxc

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-23954
  2. 2026-10-03 Alias added: GHSA-7f67-crqm-jgh7

References

Exploit 2

Patch 1

Advisory 1

Other 3

  • TI-2026-19295 Incus container environment configuration newline injection CVSS 3.1HIGH 8.7
  • TI-2025-39899 Incus vulnerable to local privilege escalation through custom storage volumes CVSS 4.0HIGH 8.6
  • TI-2026-29045 Incus out-of-bounds panic in snapshot metadata handling allows denial of service CVSS 4.0HIGH 7.1
  • TI-2026-29009 Incus nil-pointer dereference in storage bucket import allows denial of service CVSS 4.0HIGH 7.1
  • TI-2026-26122 Incus vulnerable to denial of source through crafted bucket backup file CVSS 3.1MEDIUM 6.5
  • TI-2026-25935 Incus does not verify combined fingerprint when downloading images from simplestreams servers CVSS 4.0MEDIUM 5.7
See all 17 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences