CVE-2026-28792

CRITICAL

ssw/tinacms/cli < 2.1.8 - Unauthenticated Path Traversal and Arbitrary File Write via CORS Misconfiguration

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-28792. PoCs published by alaeddine03.

AI-analyzed exploit summary The repository describes a CVE-2026-28792 vulnerability in TinaCMS CLI dev server, detailing a CORS misconfiguration combined with path traversal that allows cross-origin file exfiltration. The attack requires tricking a developer into visiting a malicious site while the dev server is running.

Description

Tina is a headless content management system. Prior to 2.1.8 , the TinaCMS CLI dev server combines a permissive CORS configuration (Access-Control-Allow-Origin: *) with the path traversal vulnerability (previously reported) to enable a browser-based drive-by attack. A remote attacker can enumerate the filesystem, write arbitrary files, and delete arbitrary files on developer's machines by simply tricking them into visiting a malicious website while tinacms dev is running. This vulnerability is fixed in 2.1.8.

Exploits (1)

github WRITEUP
by alaeddine03 · poc
https://github.com/alaeddine03/CVE-Disclosures/tree/main/Tinacms/CVE-2026-28792

The repository describes a CVE-2026-28792 vulnerability in TinaCMS CLI dev server, detailing a CORS misconfiguration combined with path traversal that allows cross-origin file exfiltration. The attack requires tricking a developer into visiting a malicious site while the dev server is running.

Classification
Writeup 90%
Attack Type
Info Leak
Complexity
Moderate
Reliability
Reliable
Target: TinaCMS CLI dev server
No auth needed
Prerequisites: TinaCMS dev server running · Victim visits malicious website
devstral-2 · analyzed Apr 11, 2026 Full analysis →

References (1)

Core 1
Core References

Scores

CVSS v3 9.6
EPSS 0.0048
EPSS Percentile 65.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-942 CWE-22
Status published
Products (1)
ssw/tinacms\/cli < 2.1.8
Published Mar 12, 2026
Tracked Since Mar 13, 2026