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CVE-2026-39908— OpenBullet2 0.3.2 NTLMv2 Hash Disclosure via UNC Path Proxy Source

Quick assessment

Affected
openbullet openbullet2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenBullet2是openbullet个人开发者的一个跨平台自动化测试与数据抓取工具。 OpenBullet2 0.3.2及之前版本在Windows上存在安全漏洞，该漏洞源于凭据泄露，可能导致远程攻击者通过配置指向攻击者控制服务器的UNC路径的作业代理源捕获进程用户的NTLMv2哈希。

CVSS 6.5 · Medium EPSS 0.54% · P44

Affected Version Matrix 1

VendorProduct Version RangeStatus
openbullet openbullet2 ≤ 0.3.2 affected
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I. Basic Information for CVE-2026-39908

Vulnerability Information
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Vulnerability Title
OpenBullet2 0.3.2 NTLMv2 Hash Disclosure via UNC Path Proxy Source
Source: CVE Program / CVE List V5
Vulnerability Description
OpenBullet2 through version 0.3.2 on Windows contains a credential disclosure vulnerability that allows remote attackers to capture the NTLMv2 hash of the process user by configuring a job proxy source with a UNC path pointing to an attacker-controlled server. When the job starts, the application attempts to load proxies from the UNC path, triggering an SMB authentication attempt that discloses the NTLMv2 hash, which can then be relayed or cracked offline.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的凭证保护机制
Source: CVE Program / CVE List V5
Vulnerability Title
OpenBullet2 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenBullet2是openbullet个人开发者的一个跨平台自动化测试与数据抓取工具。 OpenBullet2 0.3.2及之前版本在Windows上存在安全漏洞，该漏洞源于凭据泄露，可能导致远程攻击者通过配置指向攻击者控制服务器的UNC路径的作业代理源捕获进程用户的NTLMv2哈希。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
openbullet openbullet2 0 ~ 0.3.2 -

II. Public POCs for CVE-2026-39908

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III. Intelligence Information for CVE-2026-39908

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Security Blog Posts for CVE-2026-39908 (1)

News Coverage for CVE-2026-39908 (1)

Same Patch Batch · openbullet · 2026-06-08 · 5 CVEs total

CVE-2026-25555 9.8 CRITICAL OpenBullet2 0.3.2 Authentication Bypass via X-Api-Key Header
CVE-2026-25855 8.8 HIGH OpenBullet2 0.3.2 Authenticated RCE via FileProxySource Script Upload
CVE-2026-25559 8.8 HIGH OpenBullet2 0.3.2 Path Traversal via Wordlist Endpoint
CVE-2026-25856 8.8 HIGH OpenBullet2 0.3.2 Authenticated RCE via Job Configuration Interface

IV. Related Vulnerabilities

Same product: openbullet2
Same vendor: openbullet
Same weakness: CWE-522

V. Comments for CVE-2026-39908

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