Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:X/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
Primary rating from GitHub Advisory.
CVSS VectorGitHub Advisory
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:X/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
Lifecycle Timeline
2DescriptionGitHub Advisory
Impact
Mermaid v11.14.0 and earlier are vulnerable to a denial-of-service attack when rendering gantt charts, if they use the excludes attribute to exclude all dates.
Example:
gantt
excludes monday,tuesday,wednesday,thursday,friday,saturday,sunday
DoS :2025-01-01, 1dmermaid.parse is unaffected, unless you then call the ganttDb.getTasks() (which is called when rendering a diagram).
Patches
This has been patched in:
- v11.15.0 (see faafb5d49106dd32c367f3882505f2dd625aa30e)
- v10.9.6 (see a59ea56174712ee5430dfd5bc877cb5151f501a6)
Workarounds
There are no workarounds available without updating to a newer version of mermaid.
Analysis
Impact
Mermaid v11.14.0 and earlier are vulnerable to a denial-of-service attack when rendering gantt charts, if they use the excludes attribute to exclude all dates.
Example:
gantt
excludes monday,tuesday,wednesday,thursday,friday,saturday,sunday
DoS :2025-01-01, 1dmermaid.parse is unaffected, unless you then call the ganttDb.getTasks() (which is called when rendering a diagram).
Patches
This has been patched in:
- v11.15.0 (see faafb5d49106dd32c367f3882505f2dd625aa30e)
- v10.9.6 (see a59ea56174712ee5430dfd5bc877cb5151f501a6)
Workarounds
There are no workarounds available without updating to a newer version of mermaid.
Same technique Denial Of Service
View allVendor StatusVendor
SUSE
Severity: MediumShare
External POC / Exploit Code
Leaving vuln.today
EUVD-2026-33325
GHSA-6m6c-36f7-fhxh