Vulnerability · Published Jun 9, 2026 · Assigned by CERT-PL

CVE-2026-47900Stored XSS via Unsanitized Plugin Metadata in Logseq

Medium 4.6

In plain English

A medium-severity cross-site scripting in logseq from logseq. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).

Severity (CVSS 4.0)4.6Medium

Exploit odds (30 days)0.1%top 96.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 products (as reported)

Vendor	Product	Versions
logseq	logseq	0 – through 0.10.15

Weakness: CWE-79 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

References

https://cert.pl/en/posts/2026/06/CVE-2026-9279/ third-party-advisory
https://logseq.com/ product