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CVE-2026-47900

Stored XSS via Unsanitized Plugin Metadata in Logseq

MEDIUM
4.6
CVSS Score
Published: June 9, 2026 at 01:23 PM UTC
Updated: July 23, 2026 at 07:32 PM UTC
1 product affected across 1 vendorLogseq

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Severity
MEDIUM4.6
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

Logseq is vulnerable to a stored cross-site scripting (XSS). A malicious plugin can include a JavaScript payload in the "name" field of its "package.json" file, which is rendered using "innerHTML" without proper sanitization, allowing the execution of arbitrary code in the privileged host context. While only version v0.10.15 was tested and confirmed as vulnerable, status of other versions is unknown since this issue was not addressed by a patch.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Logseq· Logseq
60%
v ≤ 0.10.15

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Third Party Advisory
Source: cverecord
https://cert.pl/en/posts/2026/06/CVE-2026-9279/
Product
Source: cverecord
https://logseq.com/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.6MEDIUMCERT-PL
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-79

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