Vulnerability-Lookup

CVE-2026-78372 (GCVE-0-2026-78372)

Vulnerability from cvelistv5 – Published: 2026-08-24 13:09 – Updated: 2026-08-24 17:26

Title

RansomLook Missing Authorization Allows Disclosure of Private Group and Ransom Note Data

Summary

RansomLook does not consistently enforce authorization checks when accessing groups, markets, and ransom notes marked as private. An unauthenticated or otherwise unauthorized remote attacker can access information associated with private entities through several web views and API endpoints. The affected functionality can disclose private group or market names, ransom-note content, and metadata associated with private groups. The /compare functionality can also be queried directly with the name of a private entity, allowing an unauthorized user to retrieve information such as post counts, mirror totals, and uptime even when the entity is excluded from the normal user interface. The patch explicitly adds a privacy check before returning this information. Ransom-note views, search results, and API endpoints were similarly missing consistent filtering. The fix introduces normalized private-group identifiers and alias handling, then rejects or filters notes associated with private groups before returning them to unauthorized callers. An attacker can exploit the issue remotely without authentication or user interaction, resulting in disclosure of information that was explicitly intended to be restricted to authorized users.

Severity

9.2 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-24 17:26 UTC

CWE

CWE-862 - Missing Authorization

Assigner

CIRCL ENISA root

References

1 reference

URL	Tags
https://github.com/RansomLook/RansomLook/commit/d…	patch

Impacted products

1 product

Vendor	Product	Version	CPE status
ransomlook	ransomlook	Affected: 0 , ≤ 2.0.0 (semver)	guessed

Credits

Jeroen Pinoy Fafner [_KeyZee_]

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-78372

Vulnerability from fkie_nvd - Published: 2026-08-24 14:17 - Updated: 2026-08-24 18:17

Severity

9.2 (Critical) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

Summary

References

	URL	Tags
	5a6e4751-2f3f-4070-9419-94fb35b644e8	https://github.com/RansomLook/RansomLook/commit/dc92d6d5c076bcdbf3476aca42daf0260e8d99d7

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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    }
  ],
  "id": "CVE-2026-78372",
  "lastModified": "2026-08-24T18:17:33.277",
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          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 9.2,
          "baseSeverity": "CRITICAL",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
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          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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}

GHSA-3R47-X6XH-CMV8

Vulnerability from github – Published: 2026-08-24 15:31 – Updated: 2026-08-24 15:31

Details

The affected functionality can disclose private group or market names, ransom-note content, and metadata associated with private groups. The /compare functionality can also be queried directly with the name of a private entity, allowing an unauthorized user to retrieve information such as post counts, mirror totals, and uptime even when the entity is excluded from the normal user interface. The patch explicitly adds a privacy check before returning this information.

Ransom-note views, search results, and API endpoints were similarly missing consistent filtering. The fix introduces normalized private-group identifiers and alias handling, then rejects or filters notes associated with private groups before returning them to unauthorized callers.

An attacker can exploit the issue remotely without authentication or user interaction, resulting in disclosure of information that was explicitly intended to be restricted to authorized users.

Severity

9.2 (Critical)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-78372"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-24T14:17:05Z",
    "severity": "CRITICAL"
  },
  "details": "RansomLook does not consistently \nenforce authorization checks when accessing groups, markets, and ransom \nnotes marked as private. An unauthenticated or otherwise unauthorized \nremote attacker can access information associated with private entities \nthrough several web views and API endpoints.\n\n\nThe affected functionality can \ndisclose private group or market names, ransom-note content, and \nmetadata associated with private groups. The /compare\n functionality can also be queried directly with the name of a private \nentity, allowing an unauthorized user to retrieve information such as \npost counts, mirror totals, and uptime even when the entity is excluded \nfrom the normal user interface. The patch explicitly adds a privacy \ncheck before returning this information. \n\n\nRansom-note views, search results, \nand API endpoints were similarly missing consistent filtering. The fix \nintroduces normalized private-group identifiers and alias handling, then\n rejects or filters notes associated with private groups before \nreturning them to unauthorized callers.  \n\n\nAn attacker can exploit the issue \nremotely without authentication or user interaction, resulting in \ndisclosure of information that was explicitly intended to be restricted \nto authorized users.",
  "id": "GHSA-3r47-x6xh-cmv8",
  "modified": "2026-08-24T15:31:52Z",
  "published": "2026-08-24T15:31:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-78372"
    },
    {
      "type": "WEB",
      "url": "https://github.com/RansomLook/RansomLook/commit/dc92d6d5c076bcdbf3476aca42daf0260e8d99d7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/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"
    }
  ]
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-78372 (GCVE-0-2026-78372)

FKIE_CVE-2026-78372

GHSA-3R47-X6XH-CMV8

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Nomenclature