---
title: "CVE-2026-59814: Joplin Server - Stored XSS"
description: "Joplin Server < 3.7.7 contains a stored XSS caused by serving resources with attacker-controlled mime types and empty titles in GET /shares/:id?resource_id=, letting low-privileged users execute scripts in victim's browser, exploit requires publishing an empty-title SVG attachment."
url: https://panop.io/threat-heartbeat/CVE-2026-59814/
---

# CVE-2026-59814 Joplin Server - Stored XSS

Joplin Server < 3.7.7 contains a stored XSS caused by serving resources with attacker-controlled mime types and empty titles in GET /shares/:id?resource\_id=, letting low-privileged users execute scripts in victim's browser, exploit requires publishing an empty-title SVG attachment.

CVSS base score 7.6 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.35% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-59814)

## Details

Type

Stored XSS

Impact

Stored XSS, Information Disclosure

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N

Published

21 September 2026

Updated

15 October 2026

Weakness

[CWE-79](https://cwe.mitre.org/data/definitions/79.html)

## Vendor fix

Update to version 3.7.7 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-59814](https://nvd.nist.gov/vuln/detail/CVE-2026-59814)
- [https://github.com/laurent22/joplin/commit/920cd8f463bf9bbce9daa07581676123007118e5](https://github.com/laurent22/joplin/commit/920cd8f463bf9bbce9daa07581676123007118e5)
- [https://github.com/laurent22/joplin/pull/15787](https://github.com/laurent22/joplin/pull/15787)
- [https://github.com/laurent22/joplin/security/advisories/GHSA-mx98-7h4g-6gmh](https://github.com/laurent22/joplin/security/advisories/GHSA-mx98-7h4g-6gmh)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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