Dashboard / CVE-2026-126774

CVE-2026-126774

HIGH
MEDIUM Priority: 0.03 BB Relevance: 68/100
Published: 2026-11-11 Modified: 2026-11-12 First seen: 2026-11-11 Status: active

Attack Surface

Network Low Complexity No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: None
S: X
AT: Present
VC: High
VI: High
VA: None

Description

@tinacms/mdx before 2.4.2 contains a code injection vulnerability in its MDX serializer, which writes rich-text values into MDX expressions without escaping them. Authenticated content editors can save crafted values that break out of list field or highlightColor expressions in the stored .mdx file, executing JavaScript in visitors' browsers or on build and server-side rendering hosts.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
tinacms @tinacms/mdx 0 < 2.4.2

References & Advisories (6)

Bug Bounty Relevance

68 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

8.8 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/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

EPSS — Exploitation Probability

0.37%
Raw Score 0.003670
Percentile 31.0%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00367
2026-11-12
0.00367

Intelligence Sources

mitre ref →
nvd ref →

External Links