Vulnerability-Lookup

GHSA-489C-3G86-35RH

Vulnerability from github – Published: 2026-06-08 18:31 – Updated: 2026-06-08 18:31

Details

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.

Severity

6.5 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

7.1 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-39908"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-522"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-08T17:16:42Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-489c-3g86-35rh",
  "modified": "2026-06-08T18:31:51Z",
  "published": "2026-06-08T18:31:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39908"
    },
    {
      "type": "WEB",
      "url": "https://hackernoon.com/one-empty-header-to-admin-how-an-auth-bypass-breaks-openbullet2"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/openbullet2-ntlmv2-hash-disclosure-via-unc-path-proxy-source"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-39908 (GCVE-0-2026-39908)

Vulnerability from cvelistv5 – Published: 2026-06-08 16:47 – Updated: 2026-06-08 18:06 X_Open Source

Title

OpenBullet2 0.3.2 NTLMv2 Hash Disclosure via UNC Path Proxy Source

Summary

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-522 - Insufficiently Protected Credentials

Assigner

VulnCheck

References

2 references

URL	Tags
https://hackernoon.com/one-empty-header-to-admin-…	technical-descriptionexploit
https://www.vulncheck.com/advisories/openbullet2-…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
openbullet	openbullet2	Affected: 0 , ≤ 0.3.2 (semver)

Date Public

2026-06-05 00:00

Credits

Maksim Rogov VulnCheck

Show details on NVD website

JSON

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        "metrics": [
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                "id": "CVE-2026-39908",
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                  },
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                "timestamp": "2026-06-08T18:06:32.903409Z",
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        },
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-489C-3G86-35RH

CVE-2026-39908 (GCVE-0-2026-39908)

Tags

Sightings

Nomenclature