Import archives can exhaust server storage in ApostropheCMS
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-400.
Summary
The ApostropheCMS import-export module (@apostrophecms/import-export) is affected before 3.7.1, and the apostrophe package is affected before 4.34.0. Archive decompressed bytes, entry count and entry sizes are not bounded before the document-type authorization check, and failed extractions can leave staging and extracted files behind (CWE-400). An authenticated importer can submit archives that exhaust server storage, a denial-of-service path whose end-to-end impact is still subject to maintainer validation.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
ApostropheCMS is an open-source Node.js content management system. Prior to 3.7.1 of the import-export module, an authenticated importer can submit archives whose decompressed bytes, entry count, and entry sizes are not bounded before document-type authorization, and extraction or parsing failures can leave staging and extracted artifacts without unconditional cleanup. The already-hardened pre-authentication and write-error paths are separate, and current end-to-end denial-of-service impact from this residual path remains subject to maintainer validation. This issue is fixed in version 3.7.1.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| apostrophecms | apostrophe | before 4.34.0 | 4.34.0 | Patch available | CNA |
| apostrophecms | import-export | before 3.7.1 | 3.7.1 | Patch available | CNA |
| — | @apostrophecms/import-export (npm) | before 3.7.1 | 3.7.1 | Patch available | GHSA-9g7p-m758-rp72 |
- apostrophe Vendorapostrophecms Affected before 4.34.0 Fixed in 4.34.0 Patch available CNA
- import-export Vendorapostrophecms Affected before 3.7.1 Fixed in 3.7.1 Patch available CNA
- @apostrophecms/import-export (npm) Vendor— Affected before 3.7.1 Fixed in 3.7.1 Patch available GHSA-9g7p-m758-rp72
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:apostrophecms:apostrophecms:*:*:*:*:*:*:*:* | — | — | apostrophecms |
- cpe:2.3:a:apostrophecms:apostrophecms:*:*:*:*:*:*:*:* Versions — — ·apostrophecms
Remediation
Update @apostrophecms/import-export to version 3.7.1, which fixes this issue. The sources list no fixed version for apostrophe.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
- Fix · CNA apostrophe (apostrophecms) Fixed in 4.34.0
- Fix · CNA import-export (@apostrophecms) Fixed in 3.7.1
- Fix · GHSA-9g7p-m758-rp72 @apostrophecms/import-export (npm) Fixed in 3.7.1 Advisory →
Timeline
- 2026-10-20 Threatist record created from CVE-2026-112955
- 2026-10-21 Alias added: GHSA-9g7p-m758-rp72
- 2026-10-21 Fix available: npm/@apostrophecms/[email protected] · GHSA-9g7p-m758-rp72
- 2026-10-21 CVSS score added · GHSA-9g7p-m758-rp72
- 2026-10-21 Weakness changed · GHSA-9g7p-m758-rp72
- 2026-10-21 6 new references · GHSA-9g7p-m758-rp72
- 2026-10-22 Priority changed: MEDIUM → LOW
- 2026-10-26 CISA SSVC decision points changed
References
Other 5
- https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-9g7p-m758-rp72
- https://github.com/apostrophecms/apostrophe/commit/06e4b377f3c360f9e89c32dccd7e505ad5ddf498
- https://github.com/apostrophecms/apostrophe/commit/40b989b1a9dd23d30029b8ce7668634265cfe5ea
- https://github.com/apostrophecms/apostrophe/releases/tag/@apostrophecms/[email protected]
- https://github.com/apostrophecms/apostrophe
More apostrophecms vulnerabilities
- TI-2026-25223 ApostropheCMS has Arbitrary File Write (Zip Slip / Path Traversal) in Import-Export Gzip Extraction CVSS 3.1CRITICAL 10.0
- TI-2026-32848 Apostrophe has default XSS via `xmp` raw-text passthrough in `sanitize-html` CVSS 3.1CRITICAL 9.3
- TI-2026-38664 @apostrophecms/seo Vulnerable to Stored XSS via Unsanitized Google Analytics / GTM ID Injected into Script Tag CVSS 3.1HIGH 8.7
- TI-2026-27673 ApostropheCMS: Stored XSS in SEO Fields Leads to Authenticated API Data Exposure in ApostropheCMS CVSS 3.1HIGH 8.7
- TI-2026-76992 Unauthenticated resource exhaustion via ApostropheCMS import routes CVSS 3.1HIGH 7.5
- TI-2026-76974 ApostropheCMS leaves rejected CSV uploads in temporary directory CVSS 3.1HIGH 7.5
Sources
- CVE-2026-112955 · CVE Program
- CVE-2026-112955 · NVD
- FIRST EPSS
- GHSA-9g7p-m758-rp72 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences