Medium severity · published Aug 17, 2026
CVE-2026-63667
ApostropheCMS: Arbitrary file read via import-export attachment-name path traversal
6.5
CVSS
0.5%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AP
apostrophe · apostrophecms
< 3.6.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-63667
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-63667
github.com
https://github.com/apostrophecms/apostrophe/commit/87cccf44a23d09420875ca8a3765eb3db843836a
github.com
https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-79qf-vqgc-7xx3
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