Security research · CVE-2026-112956
ApostropheCMS is an open-source Node.js content management system.
Published Oct 20, 2026 · catalog updated Oct 21, 2026 · ApostropheCMS is an open-source
Last checked Nov 7, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2026-112956. EPSS is 0.34%. Act only if a listed version of ApostropheCMS is an open-source is installed.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (ApostropheCMS is an open-source).
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- Medium6.5
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.34%
- Remediation
- Version ranges on file
- Affected products
- npm @apostrophecms · npm @apostrophecms/import-export
## Review scope and evidence limits Package: @apostrophecms/import-export, version 3.7.0. Release tag reviewed: @apostrophecms/import-export@3.7.0, commit 9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce (September 30, 2026). Current main reviewed: 5ce3732be0ebdebb4db0f8ef160c81e8671157e6. The importer, gzip extractor, import permission gate, and core permission implementation have no differences between that release tag and the reviewed main. This follow-up is a static remediation review. We have not repeated the original end-to-end reproductions against the latest release or tested a deployed site. Current exploitability and impact therefore still require maintainer validation; the observations below establish that the reported security checks remain absent in public source. The original emailed PDF contains the original reproduction material. Please refer to that existing private attachment. ## Archive duplicate continuation permits unauthorized published-content replacement The overrideDuplicates() continuation still accepts client-supplied replacement choices, rather than binding them to a server-maintained, user-owned duplicate analysis. The replacement and write helpers do not establish a single canonical resource identity and authorization context before the update. This leaves the reported gap between draft editing authority and the published target selected for replacement unresolved at source level. The original report describes a contributor crossing the publication boundary through duplicate replacement on an import-enabled localized type. We have not repeated that end-to-end sequence on 3.7.0. Suggested remediation: bind continuation state to the initiating user, archive, job, permitted source/target mapping, locale and mode; reject inconsistent identity metadata; derive permissions from the actual loaded target and require publication authority for published targets. Source: overrideDuplicates(), replaceDocId(), and insertOrUpdateDoc() in the [importer](https
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- npm @apostrophecmsversion unspecified
- npm @apostrophecms/import-export0 → 3.7.1
- npm @apostrophecms/import-export< 3.7.1
How to fix CVE-2026-112956
Upgrade
CVE-2026-112956 lists a fix boundary at 3.7.1. Compare the installed build with that boundary before you change production.
Version check
Affected < 3.7.1
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-112956. EPSS is 0.34%. Act only if a listed version of ApostropheCMS is an open-source is installed.
Which versions are affected?
Compare what you have installed with 0 → 3.7.1, < 3.7.1. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-863: Incorrect Authorization. EPSS 0.34%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Oct 20, 2026 · NIST NVD
Detected
ApostropheCMS is an open-source Node.js content management system. Prior to 3.7.1 of the import-export module, duplicate-import continuation accepts client-controlled replacement choices without binding them to a user-owned server-side analysis or authorizing the canonical target. On an import-enabled localized type, a contributor with draft editing authority can cross the publication boundary by
Oct 20, 2026 · NIST NVD
Updated
ApostropheCMS is an open-source Node.js content management system. Prior to 3.7.1 of the import-export module, duplicate-import continuation accepts client-controlled replacement choices without binding them to a user-owned server-side analysis or authorizing the canonical target. On an import-enabled localized type, a contributor with draft editing authority can cross the publication boundary by
Oct 20, 2026 · NIST NVD
Updated
ApostropheCMS is an open-source Node.js content management system. Prior to 3.7.1 of the import-export module, duplicate-import continuation accepts client-controlled replacement choices without binding them to a user-owned server-side analysis or authorizing the canonical target. On an import-enabled localized type, a contributor with draft editing authority can cross the publication boundary by
Oct 21, 2026 · GitHub Advisory Database
Fix available
@apostrophecms/import-export fixed in 3.7.1
Oct 21, 2026 · GitHub Advisory Database
Fix available
@apostrophecms/import-export fixed in 3.7.1
Oct 21, 2026 · GitHub Advisory Database
Updated
## Review scope and evidence limits Package: @apostrophecms/import-export, version 3.7.0. Release tag reviewed: @apostrophecms/import-export@3.7.0, commit 9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce (September 30, 2026). Current main reviewed: 5ce3732be0ebdebb4db0f8ef160c81e8671157e6. The importer, gzip extractor, import permission gate, and core permission implementation have no differences between
Sources
- CVE.orgVulnerability recordCVE-2026-112956
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-112956
30-day exploitation probability 0.34%
first.org - GitHub Advisory DatabasePackage advisoryGHSA-jf5h-36mg-rp6x
ApostropheCMS: Archive duplicate continuation lets contributors overwrite published content
github.com - GitLab Advisory DatabasePackage advisoryCVE-2026-112956
Review scope and evidence limits Package: @apostrophecms/import-export, version 3.7.0. Release tag reviewed: @apostrophecms/import-export@3.7.0, commit 9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce (September 30, 2026). Current main reviewed: 5ce3732be0ebdebb4db0f8ef160c81e8671157e6. The importer, gzip extractor, import permission gate, and core permission implementation have no differences between tha
advisories.gitlab.com - NIST NVDVulnerability recordCVE-2026-112956
ApostropheCMS is an open-source Node.js content management system. Prior to 3.7.1 of the import-export module, duplicate-import continuation accepts client-controlled replacement choices without binding them to a user-owned server-side analysis or authorizing the canonical target
nvd.nist.gov - OpenSSF OSV / OSV ScannerPackage advisoryGHSA-jf5h-36mg-rp6x
ApostropheCMS: Archive duplicate continuation lets contributors overwrite published content
osv.dev
References
Freshness
Last verified in this catalog Nov 7, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- GitLab Advisory DatabaseOct 23, 2026
- FIRST EPSSOct 23, 2026
- GitHub Advisory DatabaseOct 22, 2026
- CVE.orgOct 21, 2026
- OpenSSF OSV / OSV ScannerOct 21, 2026
- NIST NVDOct 21, 2026