CVE-2026-54055 (GCVE-0-2026-54055)
Vulnerability from cvelistv5
Published
2026-06-12 20:03
Modified
2026-06-15 19:28
CWE
  • CWE-59 - Improper Link Resolution Before File Access ('Link Following')
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
  • CWE-426 - Untrusted Search Path
Summary
Kitty is a cross-platform GPU based terminal. In versions prior to 0.47.2, a local privilege escalation vulnerability exists in kitty's file transmission protocol where a child process running in the terminal can write to arbitrary files on the filesystem by exploiting a TOCTOU (Time-of-Check-Time-of-Use) race condition between symlink validation and file creation. The `os.open()` call used to create files does not use `O_NOFOLLOW`, allowing an attacker to create a symlink between the initial stat check and the actual file open, causing the write to follow the symlink to an arbitrary destination. Version 0.47.2 fixes the issue.
Impacted products
Vendor Product Version
kovidgoyal kitty Version: < 0.47.2
Create a notification for this product.
Show details on NVD website


{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-54055",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-15T18:43:37.469547Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-15T19:28:17.461Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/kovidgoyal/kitty/security/advisories/GHSA-q446-x7q6-vcxh"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "kitty",
          "vendor": "kovidgoyal",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.47.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Kitty is a cross-platform GPU based terminal. In versions prior to 0.47.2, a local privilege escalation vulnerability exists in kitty\u0027s file transmission protocol where a child process running in the terminal can write to arbitrary files on the filesystem by exploiting a TOCTOU (Time-of-Check-Time-of-Use) race condition between symlink validation and file creation. The `os.open()` call used to create files does not use `O_NOFOLLOW`, allowing an attacker to create a symlink between the initial stat check and the actual file open, causing the write to follow the symlink to an arbitrary destination. Version 0.47.2 fixes the issue."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-59",
              "description": "CWE-59: Improper Link Resolution Before File Access (\u0027Link Following\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-367",
              "description": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-426",
              "description": "CWE-426: Untrusted Search Path",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-12T20:03:17.907Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/kovidgoyal/kitty/security/advisories/GHSA-q446-x7q6-vcxh",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/kovidgoyal/kitty/security/advisories/GHSA-q446-x7q6-vcxh"
        }
      ],
      "source": {
        "advisory": "GHSA-q446-x7q6-vcxh",
        "discovery": "UNKNOWN"
      },
      "title": "Kitty has an Arbitrary File Write via Symlink Race Condition in File Transmission Protocol"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-54055",
    "datePublished": "2026-06-12T20:03:17.907Z",
    "dateReserved": "2026-06-11T18:24:35.096Z",
    "dateUpdated": "2026-06-15T19:28:17.461Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"cna\": {\"title\": \"Kitty has an Arbitrary File Write via Symlink Race Condition in File Transmission Protocol\", \"problemTypes\": [{\"descriptions\": [{\"cweId\": \"CWE-59\", \"lang\": \"en\", \"description\": \"CWE-59: Improper Link Resolution Before File Access (\u0027Link Following\u0027)\", \"type\": \"CWE\"}]}, {\"descriptions\": [{\"cweId\": \"CWE-367\", \"lang\": \"en\", \"description\": \"CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition\", \"type\": \"CWE\"}]}, {\"descriptions\": [{\"cweId\": \"CWE-426\", \"lang\": \"en\", \"description\": \"CWE-426: Untrusted Search Path\", \"type\": \"CWE\"}]}], \"metrics\": [{\"cvssV3_1\": {\"attackComplexity\": \"HIGH\", \"attackVector\": \"LOCAL\", \"availabilityImpact\": \"LOW\", \"baseScore\": 5, \"baseSeverity\": \"MEDIUM\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"scope\": \"UNCHANGED\", \"userInteraction\": \"REQUIRED\", \"vectorString\": \"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:L\", \"version\": \"3.1\"}}], \"references\": [{\"name\": \"https://github.com/kovidgoyal/kitty/security/advisories/GHSA-q446-x7q6-vcxh\", \"tags\": [\"x_refsource_CONFIRM\"], \"url\": \"https://github.com/kovidgoyal/kitty/security/advisories/GHSA-q446-x7q6-vcxh\"}], \"affected\": [{\"vendor\": \"kovidgoyal\", \"product\": \"kitty\", \"versions\": [{\"version\": \"\u003c 0.47.2\", \"status\": \"affected\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-06-12T20:03:17.907Z\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Kitty is a cross-platform GPU based terminal. In versions prior to 0.47.2, a local privilege escalation vulnerability exists in kitty\u0027s file transmission protocol where a child process running in the terminal can write to arbitrary files on the filesystem by exploiting a TOCTOU (Time-of-Check-Time-of-Use) race condition between symlink validation and file creation. The `os.open()` call used to create files does not use `O_NOFOLLOW`, allowing an attacker to create a symlink between the initial stat check and the actual file open, causing the write to follow the symlink to an arbitrary destination. Version 0.47.2 fixes the issue.\"}], \"source\": {\"advisory\": \"GHSA-q446-x7q6-vcxh\", \"discovery\": \"UNKNOWN\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-54055\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-15T18:43:37.469547Z\"}}}], \"references\": [{\"url\": \"https://github.com/kovidgoyal/kitty/security/advisories/GHSA-q446-x7q6-vcxh\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-06-15T18:44:07.956Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-54055\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"GitHub_M\", \"dateReserved\": \"2026-06-11T18:24:35.096Z\", \"datePublished\": \"2026-06-12T20:03:17.907Z\", \"dateUpdated\": \"2026-06-15T19:28:17.461Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


Loading…

Loading…