Detections
Analytics
SCA: security update for @tinacms/mdx, tinacms (GHSA-2vcc-5v34-9jc8)
medium Tenable Self-Hosted Container Security Plugin ID 443525
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- Tina is a headless content management system. In versions prior to @tinacms/mdx 2.1.7 and tinacms 3.9.3,
rich-text parsing and the default link/image renderers did not sanitize the url field on Slate link/image
nodes. Content containing javascript: or data:text/html URLs — including case-variant, whitespace-padded,
and control-character-obfuscated forms — is rendered into href/src and executes when the content is
viewed. Any actor able to author rich-text content (for example a lower-privileged editor, or
imported/external content) can achieve stored XSS against editors and site viewers. This issue is fixed in
versions @tinacms/mdx 2.1.7 and tinacms 3.9.3. (CVE-2026-55661)
Solution
Update the @tinacms/mdx library and its related packages to version 2.1.7 or later.See Also
Plugin Details
Severity: Medium
ID: 443525
Version: Revision 1.3
Type: Local
Family: SCA Checks
Published: 6/19/2026
Updated: 7/2/2026
Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Low
Score: 2.3
Percentile: 9.48
Vendor
Vendor Severity: Medium
CVSS v2
Risk Factor: Low
Base Score: 3.5
Temporal Score: 2.6
Vector: CVSS2#AV:N/AC:M/Au:S/C:N/I:P/A:N
CVSS Score Source: CVE-2026-55661
CVSS v3
Risk Factor: Medium
Base Score: 6.1
Temporal Score: 5.3
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: Medium
Base Score: 4.8
Threat Score: 1.1
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Vulnerability Information
Exploit Ease: No known exploits are available
Patch Publication Date: 6/18/2026
Vulnerability Publication Date: 6/18/2026
Reference Information
CVE: CVE-2026-55661