CVE-2026-54574 (GCVE-0-2026-54574)

Vulnerability from cvelistv5 – Published: 2026-07-29 16:32 – Updated: 2026-07-29 19:24
VLAI
Title
`proot-distro install` has a Symlink Escape (Arbitrary Host File Write) via Malicious Tar Archive
Summary
proot-distro is a utility for managing proot containers. Prior to version 5.1.5, proot-distro install extracted plain tarball root filesystems through _extract_plain_tar() in proot_distro/commands/install.py and Docker layers through _apply_layer() in proot_distro/helpers/docker.py without validating archive-controlled symlink targets in member.linkname, allowing a malicious archive to plant an absolute host-path symlink and write files through it onto the host filesystem. This issue is fixed in version 5.1.5.
Severity
8.2 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-29 19:13 UTC
CWE
  • CWE-61 - UNIX Symbolic Link (Symlink) Following
Assigner
References
Impacted products
Vendor Product Version CPE status
termux proot-distro Affected: < 5.1.5
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-54574",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-29T19:13:59.275417Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-29T19:24:47.953Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/termux/proot-distro/security/advisories/GHSA-9xq3-3fqg-4vg7"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "proot-distro",
          "vendor": "termux",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 5.1.5"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "proot-distro is a utility for managing proot containers. Prior to version 5.1.5, proot-distro install extracted plain tarball root filesystems through _extract_plain_tar() in proot_distro/commands/install.py and Docker layers through _apply_layer() in proot_distro/helpers/docker.py without validating archive-controlled symlink targets in member.linkname, allowing a malicious archive to plant an absolute host-path symlink and write files through it onto the host filesystem. This issue is fixed in version 5.1.5."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-61",
              "description": "CWE-61: UNIX Symbolic Link (Symlink) Following",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-29T16:32:15.576Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/termux/proot-distro/security/advisories/GHSA-9xq3-3fqg-4vg7",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/termux/proot-distro/security/advisories/GHSA-9xq3-3fqg-4vg7"
        },
        {
          "name": "https://github.com/termux/proot-distro/commit/a96d7a9667f38e45d812614852ee3915d1c0ae45",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/termux/proot-distro/commit/a96d7a9667f38e45d812614852ee3915d1c0ae45"
        },
        {
          "name": "https://github.com/termux/proot-distro/releases/tag/v5.1.5",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/termux/proot-distro/releases/tag/v5.1.5"
        }
      ],
      "source": {
        "advisory": "GHSA-9xq3-3fqg-4vg7",
        "discovery": "UNKNOWN"
      },
      "title": "`proot-distro install` has a Symlink Escape (Arbitrary Host File Write) via Malicious Tar Archive"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-54574",
    "datePublished": "2026-07-29T16:32:15.576Z",
    "dateReserved": "2026-06-15T19:15:27.343Z",
    "dateUpdated": "2026-07-29T19:24:47.953Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-54574",
      "date": "2026-09-15",
      "epss": "0.00145",
      "percentile": "0.04121"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-54574\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-07-29T17:16:52.743\",\"lastModified\":\"2026-07-30T20:07:01.330\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"proot-distro is a utility for managing proot containers. Prior to version 5.1.5, proot-distro install extracted plain tarball root filesystems through _extract_plain_tar() in proot_distro/commands/install.py and Docker layers through _apply_layer() in proot_distro/helpers/docker.py without validating archive-controlled symlink targets in member.linkname, allowing a malicious archive to plant an absolute host-path symlink and write files through it onto the host filesystem. This issue is fixed in version 5.1.5.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"termux\",\"product\":\"proot-distro\",\"versions\":[{\"version\":\"\u003c 5.1.5\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N\",\"baseScore\":8.2,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.8,\"impactScore\":5.8}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-07-29T19:13:59.275417Z\",\"id\":\"CVE-2026-54574\",\"options\":[{\"exploitation\":\"poc\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-61\"}]}],\"references\":[{\"url\":\"https://github.com/termux/proot-distro/commit/a96d7a9667f38e45d812614852ee3915d1c0ae45\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/termux/proot-distro/releases/tag/v5.1.5\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/termux/proot-distro/security/advisories/GHSA-9xq3-3fqg-4vg7\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/termux/proot-distro/security/advisories/GHSA-9xq3-3fqg-4vg7\",\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-54574\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-07-29T19:13:59.275417Z\"}}}], \"references\": [{\"url\": \"https://github.com/termux/proot-distro/security/advisories/GHSA-9xq3-3fqg-4vg7\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-07-29T19:15:29.505Z\"}}], \"cna\": {\"title\": \"`proot-distro install` has a Symlink Escape (Arbitrary Host File Write) via Malicious Tar Archive\", \"source\": {\"advisory\": \"GHSA-9xq3-3fqg-4vg7\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 8.2, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"REQUIRED\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"vendor\": \"termux\", \"product\": \"proot-distro\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 5.1.5\"}]}], \"references\": [{\"url\": \"https://github.com/termux/proot-distro/security/advisories/GHSA-9xq3-3fqg-4vg7\", \"name\": \"https://github.com/termux/proot-distro/security/advisories/GHSA-9xq3-3fqg-4vg7\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/termux/proot-distro/commit/a96d7a9667f38e45d812614852ee3915d1c0ae45\", \"name\": \"https://github.com/termux/proot-distro/commit/a96d7a9667f38e45d812614852ee3915d1c0ae45\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/termux/proot-distro/releases/tag/v5.1.5\", \"name\": \"https://github.com/termux/proot-distro/releases/tag/v5.1.5\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"proot-distro is a utility for managing proot containers. Prior to version 5.1.5, proot-distro install extracted plain tarball root filesystems through _extract_plain_tar() in proot_distro/commands/install.py and Docker layers through _apply_layer() in proot_distro/helpers/docker.py without validating archive-controlled symlink targets in member.linkname, allowing a malicious archive to plant an absolute host-path symlink and write files through it onto the host filesystem. This issue is fixed in version 5.1.5.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-61\", \"description\": \"CWE-61: UNIX Symbolic Link (Symlink) Following\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-07-29T16:32:15.576Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-54574\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-29T19:24:47.953Z\", \"dateReserved\": \"2026-06-15T19:15:27.343Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-07-29T16:32:15.576Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.