Vulnerability · Published Oct 20, 2026 · Assigned by GitHub_M

CVE-2026-113652ApostropheCMS uploadfs Azure backend leaks account-level SAS token into every public attachment URL (sas: true)

Medium 5.6

In plain English

A medium-severity information exposure in apostrophe from apostrophecms. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.6Medium

Exploit odds (30 days)0.3%top 79.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

ApostropheCMS is an open-source Node.js content management system. From 1.25.0 until 1.28.0, uploadfs Azure backend leaks account-level SAS token into every public attachment URL. When uploadfs is configured with the Azure backend and sas: true, createContainer() builds the BlobServiceClient from a URL that embeds the full SAS query string, and Azure SDK v12 derived clients inherit that query string. This issue is fixed in version 1.28.0.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	uploadfs	1.28.0	GHSA-hhph-8536-gfq5

Affected products (as reported)

Vendor	Product	Versions
apostrophecms	apostrophe	< 4.33.0
apostrophecms	uploadfs	>= 1.25.0, < 1.28.0

Weakness: CWE-200, CWE-522 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

References

https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-hhph-8536-gfq5 x_refsource_CONFIRM
https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce x_refsource_MISC
https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350 x_refsource_MISC
https://github.com/apostrophecms/apostrophe/releases/tag/uploadfs@1.28.0 x_refsource_MISC