# CVE-2026-63667: ApostropheCMS: Arbitrary file read via import-export attachment-name path traversal

Status: published. Published: 2026-08-17. Updated: 2026-11-02.

ApostropheCMS is an open-source Node.js content management system. Prior to 3.6.2, the import-export module in packages/import-export/lib/formats/gzip.js constructs an attachment source path from the attacker-controlled _id, name, and extension fields in aposAttachments.json without ensuring that the resolved path remains under the extracted attachments directory, allowing an authenticated contributor to import a crafted archive, read a host file with an allowed extension, and publish the copied file at an unauthenticated uploads URL. This issue is fixed in version 3.6.2.

## Remediation

- fix: @apostrophecms/import-export (npm): OSV reports a fixed version 3.6.2. Check the advisory for supported release branches. (source: OSV GHSA-79qf-vqgc-7xx3) — https://github.com/advisories/GHSA-79qf-vqgc-7xx3

## Affected products and versions

- apostrophecms / apostrophe: < 3.6.2 (affected). Source: CNA: GitHub_M
-  / @apostrophecms/import-export (@apostrophecms/import-export): ≥ 0; < 3.6.2 (affected, semver); OSV events: introduced 0; fixed 3.6.2. Source: OSV GHSA-79qf-vqgc-7xx3

## Severity and prioritization

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N; source: CNA: GitHub_M

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N; source: NVD: security-advisories@github.com

- CISA KEV: No listing in collected sources

- EPSS: 0.46% as of 2026-11-02; percentile 39.86%

- SSVC: exploitation poc; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-22

## Exploit evidence

- exploit: https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-79qf-vqgc-7xx3 (ADP: CISA-ADP)

## References

- https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-79qf-vqgc-7xx3 (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/apostrophecms/apostrophe/commit/87cccf44a23d09420875ca8a3765eb3db843836a (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/apostrophecms/apostrophe/discussions/5516 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-79qf-vqgc-7xx3 (ADP: CISA-ADP; exploit)

- https://github.com/apostrophecms/apostrophe/commit/87cccf44a23d09420875ca8a3765eb3db843836a (security-advisories@github.com)

- https://github.com/apostrophecms/apostrophe/discussions/5516 (security-advisories@github.com)

- https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-79qf-vqgc-7xx3 (security-advisories@github.com)

- https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-79qf-vqgc-7xx3 (134c704f-9b21-4f2e-91b3-4a467353bcc0)

- https://github.com/advisories/GHSA-79qf-vqgc-7xx3 (OSV / GitHub Security Advisories; advisory)

- https://osv.dev/vulnerability/GHSA-79qf-vqgc-7xx3 (OSV / GitHub Security Advisories; osv)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-63667; retrieved 2026-11-03; source updated 2026-11-02

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-63667; retrieved 2026-11-03; source updated 2026-11-02

- OSV / GitHub Security Advisories: https://osv.dev/vulnerability/GHSA-79qf-vqgc-7xx3; retrieved 2026-11-03; source updated 2026-11-02

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-63667; retrieved 2026-11-03; source updated Not reported

Revision: 3168908f6f34482ad78d74d1743ca680e9822e6080ac1b33868209910f91b62d

Canonical: https://y2.dev/cve/CVE-2026-63667

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