# CVE-2026-115375: Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 Path Traversal via Instance Backup Dependent Volumes

Status: published. Published: 2026-10-22. Updated: 2026-11-05.

Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 contains a path traversal vulnerability that allows clients able to create instances to write files on the host. The flaw stems from unvalidated dependent custom volume names in instance backup index.yaml files. Attackers can import a crafted instance backup with ../ sequences in dependent volume names to create root-owned directories with controlled content, leading to full host compromise.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- lxc / incus (github.com/lxc/incus/v7/cmd/incusd): ≥ 7.0.0; < 7.0.2 (affected, semver); 7.0.2 (unaffected, semver); ≥ 7.1.0; < 7.5.0 (affected, semver); 7.5.0 (unaffected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 9.4 (critical); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H; source: CNA: VulnCheck

- CVSS 3.1: 9.9 (critical); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H; source: CNA: VulnCheck

- CVSS 4.0: 9.4 (critical); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: disclosure@vulncheck.com

- CVSS 3.1: 9.9 (critical); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H; source: NVD: disclosure@vulncheck.com

- CISA KEV: No listing in collected sources

- EPSS: 0.40% as of 2026-11-05; percentile 34.96%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-22

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/lxc/incus/security/advisories/GHSA-hpjh-q53p-f27r (CNA: VulnCheck; vendor-advisory)

- https://www.vulncheck.com/advisories/incus-7.0.0-before-7.0.2-and-7.1.0-before-7.5.0-path-traversal-via-instance-backup-dependent-volumes (CNA: VulnCheck; third-party-advisory)

- https://github.com/lxc/incus/security/advisories/GHSA-hpjh-q53p-f27r (disclosure@vulncheck.com)

- https://www.vulncheck.com/advisories/incus-7.0.0-before-7.0.2-and-7.1.0-before-7.5.0-path-traversal-via-instance-backup-dependent-volumes (disclosure@vulncheck.com)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-115375; retrieved 2026-11-05; source updated 2026-11-05

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-115375; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-115375; retrieved 2026-11-05; source updated Not reported

Revision: d4b572d7c1808ac800e1fd1cfe9d2634dba1f29807f208c460b0c781ba76b782

Canonical: https://y2.dev/cve/CVE-2026-115375

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