Vulnerability-Lookup

GHSA-GG86-H3JM-9M46

Vulnerability from github – Published: 2026-06-05 12:31 – Updated: 2026-06-05 15:32

Details

The linqi application contains hardcoded cryptographic keys. Additionally, the application uses a weak algorithm with a limited ASCII charset to dynamically generate Initialization Vectors (IVs) for AES/CBC encryption, making known-plaintext attacks feasible. An attacker with local access can leverage these vulnerabilities to decrypt sensitive obfuscated strings, including ConnectionString values containing database credentials from appsettings.json.

Severity

8.5 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-11347"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-321"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-05T11:16:34Z",
    "severity": "HIGH"
  },
  "details": "The linqi application contains hardcoded cryptographic keys. Additionally, the application uses a weak algorithm with a limited ASCII charset to dynamically generate Initialization Vectors (IVs) for AES/CBC encryption, making known-plaintext attacks feasible. An attacker with local access can leverage these vulnerabilities to decrypt sensitive obfuscated strings, including ConnectionString values containing database credentials from appsettings.json.",
  "id": "GHSA-gg86-h3jm-9m46",
  "modified": "2026-06-05T15:32:20Z",
  "published": "2026-06-05T12:31:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-11347"
    },
    {
      "type": "WEB",
      "url": "https://linqi.help/en/reference/security/security-advisories/#security-advisory-hardcoded-cryptographic-keys-and-weak-iv-generation-in-linqi"
    },
    {
      "type": "WEB",
      "url": "https://linqi.help/en/reference/security/security-advisories/#security-advisory-hardcoded-cryptographic-keys-and-weak-iv-generation-in-the-linqi-application"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/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-2026-11347 (GCVE-0-2026-11347)

Vulnerability from cvelistv5 – Published: 2026-06-05 10:18 – Updated: 2026-06-05 20:22

Title

Hardcoded Cryptographic Keys and Weak IV Generation in linqi

Summary

Severity

8.5 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-321 - Use of Hard-coded Cryptographic Key
CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

Assigner

linqi

References

1 reference

URL	Tags
https://linqi.help/en/reference/security/security…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
linqi GmbH	linqi	Affected: 0 , ≤ 1.4.8.5 (custom)

Credits

Ianis BERNARD from NATO Cyber Security Centre (NCSC)

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JSON

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                "id": "CVE-2026-11347",
                "options": [
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                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-05T20:22:15.334464Z",
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      ],
      "metrics": [
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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-GG86-H3JM-9M46

CVE-2026-11347 (GCVE-0-2026-11347)

Tags

Sightings

Nomenclature