Vulnerability-Lookup

GHSA-4VJ5-VH2W-8G5J

Vulnerability from github – Published: 2026-03-27 00:31 – Updated: 2026-06-03 21:30

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": "2026-06-03T21:30:24Z",
  "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/issues/2079"
    },
    {
      "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: 2026-06-04 14:57

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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-732 - Incorrect Permission Assignment for Critical Resource

Assigner

mitre

References

5 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…
https://github.com/TigerVNC/tigervnc/issues/2079

Impacted products

1 product

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

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JSON

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        "metrics": [
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                "id": "CVE-2026-34352",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-04T14:56:55.844081Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-04T14:57:10.753Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          {
            "tags": [
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          "vendor": "TigerVNC",
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            "attackComplexity": "LOW",
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    "datePublished": "2026-03-26T22:30:46.928Z",
    "dateReserved": "2026-03-26T22:30:46.508Z",
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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-4VJ5-VH2W-8G5J

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

Tags

Sightings

Nomenclature