CVE-2026-82805: Typora Mermaid Rendering cross site scripting
A vulnerability was found in Typora up to 1.13.8/1.14.6. This vulnerability affects unknown code of the component Mermaid Rendering Engine. The manipulation of the argument classDef/style results in cross site scripting. The attack may be launched remotely. The exploit has been made public and could be used. Upgrading to version 1.14.8 is able to resolve this issue. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Typorato a version that resolves this vulnerability.Fixed in 1.14.8
Event History
Frequently Asked Questions
What user interaction is required for exploitation?
User interaction is required. An attacker would need to cause a user to process Mermaid content that uses manipulated classDef or style arguments.
Can this be exploited remotely, and is exploit code available?
Yes. The attack may be launched remotely, and a public exploit has been disclosed.
Which versions should be upgraded?
Typora versions up to 1.13.8 and 1.14.6 are affected. Upgrade to version 1.14.8 to resolve the issue.