by Kastro
Paper/Archive/CVE-2026-21855

CVE-2026-21855

the-hideout tarkov-data-manager — Tarkov Data Manager has Unauthenticated Reflected XSS

EPSS 0.2%public exploitCVSS 9.3
critical.is priorityof 100
41
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 15.4.154 × 203.1Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

The Tarkov Data Manager is a tool to manage the Tarkov item data. Prior to 02 January 2025, a reflected Cross Site Scripting (XSS) vulnerability in the toast notification system allows any attacker to execute arbitrary JavaScript in the context of a victim's browser session by crafting a malicious URL. A series of fix commits on 02 January 2025 fixed this and other vulnerabilities.

Affected

ProductAffectedFixed inSource
tarkov-data-manager<= 2.0.0–CNA

Scores by source

GitHub_M (CNA)9.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: partial

References

refgithub.com/the-hideout/tarkov-data-manager/security/advisories/GHSA-9c23-rrg9-jc89