SEPTEMBER 17, 2026
Live Feed
Back to database
Case File

CVE-2026-80349

CRITICAL · CVSS 9.8 EPSS 0.45% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-26 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

TarsWeb is vulnerable due to improper handling of client-controlled headers, specifically the X-Forwarded-For header, which allows attackers to impersonate any account, including administrators, without authentication. This critical flaw enables unauthorized access to sensitive routes, including user and role management, service configuration, and deployment capabilities. Organizations using TarsWeb should prioritize patching this vulnerability, especially those with administrative interfaces exposed to untrusted networks.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-80349
Severity
CRITICAL
CVSS
9.8
EPSS
0.45%

Original NVD Description

TarsWeb decides whether a request comes from a trusted local caller using a client-controlled header. app.js sets Koa's proxy option to true without naming which upstream proxies may be trusted and without limiting the number of forwarded hops, so the request address Koa reports is taken from the X-Forwarded-For header supplied by the caller. In midware/ssoMidware.js a single branch covers both the ignored-path list and the ignoreIps allowlist from config/loginConf.js, which contains the loopback address, and that branch assigns the effective account identity from the uid query parameter before falling through to the request without validating any ticket, cookie or password. A request carrying a forged X-Forwarded-For value naming the loopback address and a uid naming an existing account therefore reaches every route the console mounts as that account, including an administrator, with no credential of any kind. Those routes include user and role administration, service configuration, and package upload and deployment. Version 3.0.16 separates the two branches so that a match on the address allowlist assigns the configured default account rather than one named by the caller.