Description
The War Thunder game client transmits its authentication bearer token (auth_jwt) in the very first data packet after the TCP handshake, using only LZ4 compression rather than encryption. An attacker positioned on the network path can passively intercept and decompress this packet to reveal the plaintext JSON payload. This vulnerability allows for temporary authenticated impersonation, enabling an attacker to access game services and certain user data (such as email address and displayed phone number) as the affected user. While this allows for unauthorized access to gameplay, it does not facilitate full account takeover, as it cannot be used to modify account security settings, change passwords, bypass two-factor authentication for account management, or access financial information.
Published: 2026-10-20
Score: 4.8 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Tue, 20 Oct 2026 22:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-200

Tue, 20 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-319
Metrics cvssV3_1

{'score': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 20 Oct 2026 20:00:00 +0000

Type Values Removed Values Added
Description The War Thunder game client transmits its authentication bearer token (auth_jwt) in the very first data packet after the TCP handshake, using only LZ4 compression rather than encryption. An attacker positioned on the network path can passively intercept and decompress this packet to reveal the plaintext JSON payload. This vulnerability allows for temporary authenticated impersonation, enabling an attacker to access game services and certain user data (such as email address and displayed phone number) as the affected user. While this allows for unauthorized access to gameplay, it does not facilitate full account takeover, as it cannot be used to modify account security settings, change passwords, bypass two-factor authentication for account management, or access financial information.
Title War Thunder Account Impersonation
References

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: certcc

Published:

Updated: 2026-10-20T20:22:22.419Z

Reserved: 2026-10-08T15:54:22.726Z

Link: CVE-2026-107692

cve-icon Vulnrichment

Updated: 2026-10-20T20:22:04.638Z

cve-icon NVD

Status : Received

Published: 2026-10-20T20:17:14.240

Modified: 2026-10-20T21:17:15.310

Link: CVE-2026-107692

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-20T22:30:18Z

Weaknesses
  • CWE-200

    Exposure of Sensitive Information to an Unauthorized Actor

  • CWE-319

    Cleartext Transmission of Sensitive Information