CVE-2026-54074

Tina is a headless content management system. @tinacms/cli versions prior to 2.4.3 contain a Remote Code Execution vulnerability in the Forestry-to-Tina migration command. The internal helper addVariablesToCode unquotes any value matching the marker "TINAINTERNAL:::.?:::" inside the stringified...

CVE-2026-55660 TinaCMS: Cross-origin postMessage handlers and rich-text URL-sanitization bypass enable stored XSS and session takeover

Tina is a headless content management system. In versions prior to @tinacms/app 2.5.6 and tinacms 3.9.3, cross-origin postMessage handlers and a rich-text URL-sanitization bypass enable stored XSS and session takeover. The library registers window message listeners — the useTina overlay handler,...

CVE-2026-55660

Tina is a headless content management system. In versions prior to @tinacms/app 2.5.6 and tinacms 3.9.3, cross-origin postMessage handlers and a rich-text URL-sanitization bypass enable stored XSS and session takeover. The library registers window message listeners — the useTina overlay handler,...

CVE-2026-54074

Tina is a headless content management system. @tinacms/cli versions prior to 2.4.3 contain a Remote Code Execution vulnerability in the Forestry-to-Tina migration command. The internal helper addVariablesToCode unquotes any value matching the marker "TINAINTERNAL:::.?:::" inside the stringified...

CVE-2026-55661

CVE-2026-55661 affects TinaCMS rich-text rendering (Slate JSON) where the url field on Slate link/image nodes was not sanitized, allowing stored XSS via dangerous URL schemes such as javascript: or data:text/html. Affected versions include tinacms/mdx <2.1.7 and tinacms =2.1.7 and tinacms >...

CVE-2026-55661 TinaCMS rich-text (slatejson) rendering does not sanitize link/image URLs, allowing stored XSS via dangerous URL schemes

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,...

NPM: TinaCMS: Cross-origin postMessage handlers and rich-text URL-sanitization bypass enable stored XSS and session takeover

NPM: TinaCMS: Cross-origin postMessage handlers and rich-text URL-sanitization bypass enable stored XSS and session takeover vulnerability discovered by ? in WordPress Npm tinacms versions 3.9.3...

@cloudcommerce/storefront (>=0.10.0, <=0.11.0), @gspenst/next (>=0.1.0, <=0.1.2) +6 more potentially affected by CVE-2026-55660 via @tinacms/app (>=2.0.0, <=2.5.5)

@tinacms/app NPM version =2.0.0, =0.10.0, =0.1.0, =0.1.0, =0.0.0-0120cc5-20241030181751, =0.0.2, =0.0.3, =0.1.1, =0.1.3 - ramidus 1.2.1 Source cves: CVE-2026-55660 Source advisory: OSV:GHSA-G5QX-H5F3-MP2F...

@cloudcommerce/storefront (>=0.10.0, <=0.11.0), @gspenst/next (>=0.1.0, <=0.1.2) +6 more potentially affected by CVE-2026-55660 via @tinacms/app (>=2.0.0, <=2.5.5)

@tinacms/app NPM version =2.0.0, =0.10.0, =0.1.0, =0.1.0, =0.0.0-0120cc5-20241030181751, =0.0.2, =0.0.3, =0.1.1, =0.1.3 - ramidus 1.2.1 Source cves: CVE-2026-55660 Source advisory: SNYK:JS-TINACMSAPP-17420389...

Improper Verification of Source of a Communication Channel

Overview tinacms is a headless content management system with support for Markdown, MDX, JSON, YAML, and more. Affected versions of this package are vulnerable to Improper Verification of Source of a Communication Channel via improper validation of cross-origin messages in the window message...

@tinacms/app (>=0.0.0-574b548-20260304015858, <=2.5.5), @tinacms/cli (>=0.0.0-1d830a0-20260128234746, <=2.5.0) +1 more potentially affected by CVE-2026-55660 via tinacms (>=3.0.0, <=3.9.2)

tinacms NPM version =3.0.0, =0.0.0-574b548-20260304015858, =0.0.0-1d830a0-20260128234746, =0.1.12, =0.2.14 Source cves: CVE-2026-55660 Source advisory: SNYK:JS-TINACMS-17420390...

Improper Verification of Source of a Communication Channel

Overview Affected versions of this package are vulnerable to Improper Verification of Source of a Communication Channel via improper validation of cross-origin messages in the window message listeners. An attacker can hijack authenticated editing sessions by sending crafted postMessage events fro...

@tinacms/app (>=0.0.0-574b548-20260304015858, <=2.5.5), @tinacms/cli (>=0.0.0-1d830a0-20260128234746, <=2.5.0) +1 more potentially affected by CVE-2026-55660 via tinacms (>=3.0.0, <=3.9.2)

tinacms NPM version =3.0.0, =0.0.0-574b548-20260304015858, =0.0.0-1d830a0-20260128234746, =0.1.12, =0.2.14 Source cves: CVE-2026-55660 Source advisory: OSV:GHSA-G5QX-H5F3-MP2F...

Arbitrary Code Injection

Overview @tinacms/cli is a package used to set up your project with Tina Cloud configuration, and run a local version of the Tina Cloud content-api. Affected versions of this package are vulnerable to Arbitrary Code Injection through the addVariablesToCode/makeFieldsWithInternalCode process in...

@tinacms/cli: Remote Code Execution in @tinacms/cli via Forestry migration — unsanitised __TINA_INTERNAL__ marker in user-controlled YAML labels

Description Summary @tinacms/cli contains a Remote Code Execution vulnerability in its Forestry-to-Tina migration command. The internal helper addVariablesToCode unquotes any value matching the marker "TINAINTERNAL:::.?:::" inside the stringified collection JSON. User-supplied label and name fiel...

GHSA-4936-9HRH-QQPW @tinacms/cli: Remote Code Execution in @tinacms/cli via Forestry migration — unsanitised __TINA_INTERNAL__ marker in user-controlled YAML labels

Description Summary @tinacms/cli contains a Remote Code Execution vulnerability in its Forestry-to-Tina migration command. The internal helper addVariablesToCode unquotes any value matching the marker "TINAINTERNAL:::.?:::" inside the stringified collection JSON. User-supplied label and name fiel...

PT-2026-51104

Name of the Vulnerable Software and Affected Versions @tinacms/app versions prior to 2.5.6 tinacms versions prior to 3.9.3 Description Cross-origin postMessage handlers allow for stored XSS and session takeover. The software registers window message listeners—specifically the useTina overlay...

Cross-site Scripting (XSS)

Overview tinacms is a headless content management system with support for Markdown, MDX, JSON, YAML, and more. Affected versions of this package are vulnerable to Cross-site Scripting XSS via the url field in Slate link or image nodes during rich-text rendering and parsing. An attacker can execut...

@tinacms/app (>=0.0.0-00aadfd-20260223215804, <=2.5.5), @tinacms/cli (>=0.0.0-00aadfd-20260223215804, <=2.5.0) +5 more potentially affected by CVE-2026-55661 via @tinacms/mdx (>=2.0.0, <=2.1.6)

@tinacms/mdx NPM version =2.0.0, =0.0.0-00aadfd-20260223215804, =0.0.0-00aadfd-20260223215804, =0.0.0-00aadfd-20260223215804, =0.0.0-00aadfd-20260223215804, =0.0.0-00aadfd-20260223215804, =0.0.0-00aadfd-20260223215804, =0.0.0-00aadfd-20260223215804, =3.9.2 Source cves: CVE-2026-55661 Source...

@tinacms/app (>=0.0.0-00aadfd-20260223215804, <=2.5.5), @tinacms/cli (>=0.0.0-00aadfd-20260223215804, <=2.5.0) +5 more potentially affected by CVE-2026-55661 via @tinacms/mdx (>=2.0.0, <=2.1.6)

@tinacms/mdx NPM version =2.0.0, =0.0.0-00aadfd-20260223215804, =0.0.0-00aadfd-20260223215804, =0.0.0-00aadfd-20260223215804, =0.0.0-00aadfd-20260223215804, =0.0.0-00aadfd-20260223215804, =0.0.0-00aadfd-20260223215804, =0.0.0-00aadfd-20260223215804, =3.9.2 Source cves: CVE-2026-55661 Source...