Vulnerability-Lookup

GHSA-4VJ5-VH2W-8G5J

Vulnerability from github – Published: 2026-03-27 00:31 – Updated: 2026-03-27 00:31

Details

In TigerVNC before 1.16.2, Image.cxx in x0vncserver allows other users to observe or manipulate the screen contents, or cause an application crash, because of incorrect permissions.

Severity ?

8.5 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-34352"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-732"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-26T23:16:20Z",
    "severity": "HIGH"
  },
  "details": "In TigerVNC before 1.16.2, Image.cxx in x0vncserver allows other users to observe or manipulate the screen contents, or cause an application crash, because of incorrect permissions.",
  "id": "GHSA-4vj5-vh2w-8g5j",
  "modified": "2026-03-27T00:31:21Z",
  "published": "2026-03-27T00:31:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34352"
    },
    {
      "type": "WEB",
      "url": "https://github.com/TigerVNC/tigervnc/commit/0b5cab169d847789efa54459a87659d3fd484393"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/tigervnc-announce/c/anHL9WLshLI"
    },
    {
      "type": "WEB",
      "url": "https://sourceforge.net/projects/tigervnc/files/stable/1.16.2"
    },
    {
      "type": "WEB",
      "url": "https://www.openwall.com/lists/oss-security/2026/03/26/7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-34352 (GCVE-0-2026-34352)

Vulnerability from cvelistv5 – Published: 2026-03-26 22:30 – Updated: 2026-03-27 13:53

Summary

In TigerVNC before 1.16.2, Image.cxx in x0vncserver allows other users to observe or manipulate the screen contents, or cause an application crash, because of incorrect permissions.

Severity ?

8.5 (High)


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

CWE

CWE-732 - Incorrect Permission Assignment for Critical Resource

Assigner

mitre

References

URL

Tags

	https://www.openwall.com/lists/oss-security/2026/…
	https://github.com/TigerVNC/tigervnc/commit/0b5ca…
	https://sourceforge.net/projects/tigervnc/files/s…
	https://groups.google.com/g/tigervnc-announce/c/a…

Impacted products

	Vendor	Product	Version
	TigerVNC	TigerVNC	Affected: 0 , < 1.16.2 (semver)

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-34352",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-27T13:28:49.782878Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-27T13:53:48.564Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "TigerVNC",
          "vendor": "TigerVNC",
          "versions": [
            {
              "lessThan": "1.16.2",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In TigerVNC before 1.16.2, Image.cxx in x0vncserver allows other users to observe or manipulate the screen contents, or cause an application crash, because of incorrect permissions."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 8.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-732",
              "description": "CWE-732 Incorrect Permission Assignment for Critical Resource",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-26T22:37:28.411Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://www.openwall.com/lists/oss-security/2026/03/26/7"
        },
        {
          "url": "https://github.com/TigerVNC/tigervnc/commit/0b5cab169d847789efa54459a87659d3fd484393"
        },
        {
          "url": "https://sourceforge.net/projects/tigervnc/files/stable/1.16.2"
        },
        {
          "url": "https://groups.google.com/g/tigervnc-announce/c/anHL9WLshLI"
        }
      ],
      "x_generator": {
        "engine": "CVE-Request-form 0.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2026-34352",
    "datePublished": "2026-03-26T22:30:46.928Z",
    "dateReserved": "2026-03-26T22:30:46.508Z",
    "dateUpdated": "2026-03-27T13:53:48.564Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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-4VJ5-VH2W-8G5J

CVE-2026-34352 (GCVE-0-2026-34352)

Tags

Sightings

Nomenclature