Typora Mermaid Rendering cross site scripting

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-82805
StatePUBLISHED
AssignerVulDB
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-31 16:19:19 UTC
Updated2026-08-31 20:56:08 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v4.0 2.1 LOW from [email protected]

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.002820000 probability, percentile 0.202560000 (date 2026-09-01)

Problem Types: CWE-79 | CWE-94 | CWE-79 Cross Site Scripting | CWE-94 Code Injection

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary2.1LOWCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/C...
4.0CNADECLARED5.3MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
3.1[email protected]Primary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C
3.0CNADECLARED4.3MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C
2.0[email protected]Secondary5AV:N/AC:L/Au:N/C:N/I:P/A:N
2.0CNADECLARED5AV:N/AC:L/Au:N/C:N/I:P/A:N/E:POC/RL:OF/RC:C

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
Passive
Confidentiality
None
Integrity
Low
Availability
None
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

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

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Typora affected 1.13.0 Not specified
CNA Na Typora affected 1.13.1 Not specified
CNA Na Typora affected 1.13.2 Not specified
CNA Na Typora affected 1.13.3 Not specified
CNA Na Typora affected 1.13.4 Not specified
CNA Na Typora affected 1.13.5 Not specified
CNA Na Typora affected 1.13.6 Not specified
CNA Na Typora affected 1.13.7 Not specified
CNA Na Typora affected 1.13.8 Not specified
CNA Na Typora affected 1.14.0 Not specified
CNA Na Typora affected 1.14.1 Not specified
CNA Na Typora affected 1.14.2 Not specified
CNA Na Typora affected 1.14.3 Not specified
CNA Na Typora affected 1.14.4 Not specified
CNA Na Typora affected 1.14.5 Not specified
CNA Na Typora affected 1.14.6 Not specified
CNA Na Typora unaffected 1.14.8 Not specified

References

ReferenceSourceLinkTags
vuldb.com/cve/CVE-2026-82805 [email protected] vuldb.com
vuldb.com/vuln/397225 [email protected] vuldb.com
typora.io [email protected] typora.io
typora.io/releases/all [email protected] typora.io
vuldb.com/vuln/397225/cti [email protected] vuldb.com
github.com/zzk6th/cve/issues/5 [email protected] github.com
vuldb.com/submit/863528 [email protected] vuldb.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: z0ng (VulDB User) (en)

CNA: VulDB CNA Team (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-08-31T00:00:00.000ZAdvisory disclosed
CNA2026-08-31T02:00:00.000ZVulDB entry created
CNA2026-08-31T06:35:33.000ZVulDB entry last update

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