TI-2026-35348 Aliases CVE-2026-47900 GHSA-fff3-7r5v-99cq

Stored XSS via Unsanitized Plugin Metadata in Logseq

LOW 20CWE-79Published 2026-06-09 · Updated 2026-06-09

Key facts

Attack vector: Local
Privileges required: None
User interaction: Active
Attack complexity: Low
Attack requirements: None
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00139 3rd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
logseq	logseq	up to 0.10.15	—	No fix listed	CNA

logseq Vendorlogseq Affected up to 0.10.15 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-47900
2026-10-03 Alias added: GHSA-fff3-7r5v-99cq

References

Advisory 1

https://cert.pl/en/posts/2026/06/CVE-2026-9279/

Other 1

https://logseq.com/

TI-2026-08151 Shell command injection in Logseq CVSS 4.0HIGH 8.7
TI-2026-35347 Arbitrary File Read, Write, Rename, and Delete in Logseq CVSS 4.0HIGH 8.7
TI-2026-35349 Iframe escape by plugins in Logseq CVSS 4.0MEDIUM 4.6

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences