CVE-2026-82805: Cross Site Scripting in Typora
Description
A cross-site scripting (XSS) vulnerability exists in Typora's Mermaid Rendering Engine affecting versions 1.13.0 through 1.14.6. The issue arises from improper handling of the classDef/style argument, allowing remote attackers to inject malicious scripts. The vulnerability has a medium severity score of 5.3 and an exploit has been publicly disclosed. Upgrading to Typora version 1.14.8 resolves this vulnerability.
CVSS v4.0
Score 5.3medium
Affected software
Typora
cpe:2.3:a:typora:typora:*:*:*:*:*:*:*:*AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Typora versions 1.13.0 through 1.14.6 contain a cross-site scripting vulnerability in the Mermaid Rendering Engine component. The vulnerability is triggered by manipulation of the classDef/style argument, which leads to script injection. This flaw can be exploited remotely without privileges or user interaction beyond triggering the vulnerable component. The vendor responded promptly and released version 1.14.8 to fix the issue. The CVSS 4.0 base score is 5.3, indicating medium severity.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary scripts in the context of the affected application, potentially leading to session hijacking, data theft, or other malicious actions within the Typora environment. The vulnerability is exploitable remotely and does not require privileges or user interaction beyond triggering the vulnerable input.
Mitigation Recommendations
Upgrade Typora to version 1.14.8 or later, which contains the official fix for this vulnerability. The vendor has released this fixed version promptly after disclosure. No additional mitigation steps are required once the upgrade is applied.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-08-31T04:29:30.694Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a95a348acd9273b494ac4b5
Added to database: 08/31/2026, 15:52:40 UTC
Last enriched: 09/07/2026, 15:41:31 UTC
Last updated: 10/14/2026, 06:48:21 UTC
Views: 98
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