CVE-2026-54074Public exploit

Code execution via forgeable Forestry migration marker

Published Jul 1, 2026 · Updated Jul 1, 2026

Code injection in TinaCMS @tinacms/cli before 2.4.3 allows attackers to execute JavaScript via a crafted Forestry project. The Forestry migrator passes user-controlled YAML label and name fields through JSON.stringify, then addVariablesToCode unquotes a forgeable TINA_INTERNAL marker into generated module-level source. Execution requires a developer to migrate the project and run tinacms dev or tinacms build, after which the payload runs with that developer's privileges.

CVSS severity7.8
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in TinaCMS @tinacms/cli before 2.4.3 allows attackers to execute JavaScript via a crafted Forestry project. The Forestry migrator passes user-controlled YAML label and name fields through JSON.stringify, then addVariablesToCode unquotes a forgeable TINA_INTERNAL marker into generated module-level source. Execution requires a developer to migrate the project and run tinacms dev or tinacms build, after which the payload runs with that developer's privileges.

The record

CVE
CVE-2026-54074
Published
Jul 1, 2026
Updated
Jul 1, 2026
Vendor
TinaCMS
Product
TinaCMS
Classifications
CWE-94, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.4.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

TinaCMS · TinaCMSversion=< 2.4.3

Published CVSS scores

7.8GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1204.002User Execution: Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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