Improper Authorization Affecting github.com/siyuan-note/siyuan/kernel/api package, versions <3.6.4-dev2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published30 Apr 2026
- disclosed10 Apr 2026
- creditch1nhpd
Introduced: 10 Apr 2026
CVE-2026-40259 Â (opens in a new tab)How to fix?
Upgrade github.com/siyuan-note/siyuan/kernel/api to version 3.6.4-dev2 or higher.
Overview
Affected versions of this package are vulnerable to Improper Authorization via the /api/av/removeUnusedAttributeView process. An attacker can delete arbitrary attribute view definition files and disrupt workspace integrity and availability by sending crafted requests with a valid reader token and a known avID. This is only exploitable if the publish service is enabled, the attacker can access the publish service, and possesses valid publish-reader credentials.