What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-20 · updated 2026-10-21
• Weakness: CWE-200

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 products

• apostrophecms apostrophe: before 4.33.0
• apostrophecms uploadfs: from 1.25.0, < 1.28.0

References

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

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