Vulnerability-Lookup

ubuntu-cve-2026-53785

Vulnerability from osv_ubuntu

Published

2026-08-13 15:19

Modified

2026-08-19 11:06

Summary

Details

rsync before 3.5.0 contains a path traversal vulnerability that allows a malicious sender to write files outside the intended destination directory tree by crafting relative paths with symlink components in --relative mode. The make_path() function follows symlinks pointing outside the destination tree while creating intermediate directories without verifying that created paths remain within the destination boundary, enabling arbitrary file writes on the receiver's filesystem.

Severity

7.1 (High)


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

6.9 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-53785	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-53785	REPORT
	https://download.samba.org/pub/rsync/NEWS#3.5.0	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "rsync",
            "binary_version": "3.1.0-2ubuntu0.4+esm4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "rsync",
        "purl": "pkg:deb/ubuntu/rsync@3.1.0-2ubuntu0.4+esm4?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.0.9-4ubuntu1",
        "3.1.0-2",
        "3.1.0-2ubuntu0.1",
        "3.1.0-2ubuntu0.2",
        "3.1.0-2ubuntu0.3",
        "3.1.0-2ubuntu0.4",
        "3.1.0-2ubuntu0.4+esm1",
        "3.1.0-2ubuntu0.4+esm2",
        "3.1.0-2ubuntu0.4+esm3",
        "3.1.0-2ubuntu0.4+esm4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "rsync",
            "binary_version": "3.1.1-3ubuntu1.3+esm6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "rsync",
        "purl": "pkg:deb/ubuntu/rsync@3.1.1-3ubuntu1.3+esm6?arch=source\u0026distro=esm-infra-legacy/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1.1-3",
        "3.1.1-3ubuntu1",
        "3.1.1-3ubuntu1.1",
        "3.1.1-3ubuntu1.2",
        "3.1.1-3ubuntu1.3",
        "3.1.1-3ubuntu1.3+esm1",
        "3.1.1-3ubuntu1.3+esm2",
        "3.1.1-3ubuntu1.3+esm3",
        "3.1.1-3ubuntu1.3+esm4",
        "3.1.1-3ubuntu1.3+esm5",
        "3.1.1-3ubuntu1.3+esm6"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "rsync",
            "binary_version": "3.1.2-2.1ubuntu1.6+esm4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "rsync",
        "purl": "pkg:deb/ubuntu/rsync@3.1.2-2.1ubuntu1.6+esm4?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1.2-2",
        "3.1.2-2.1",
        "3.1.2-2.1ubuntu1",
        "3.1.2-2.1ubuntu1.1",
        "3.1.2-2.1ubuntu1.2",
        "3.1.2-2.1ubuntu1.3",
        "3.1.2-2.1ubuntu1.4",
        "3.1.2-2.1ubuntu1.5",
        "3.1.2-2.1ubuntu1.6",
        "3.1.2-2.1ubuntu1.6+esm1",
        "3.1.2-2.1ubuntu1.6+esm2",
        "3.1.2-2.1ubuntu1.6+esm3",
        "3.1.2-2.1ubuntu1.6+esm4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "rsync",
            "binary_version": "3.1.3-8ubuntu0.9+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "rsync",
        "purl": "pkg:deb/ubuntu/rsync@3.1.3-8ubuntu0.9+esm2?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1.3-6",
        "3.1.3-8",
        "3.1.3-8ubuntu0.1",
        "3.1.3-8ubuntu0.2",
        "3.1.3-8ubuntu0.3",
        "3.1.3-8ubuntu0.4",
        "3.1.3-8ubuntu0.5",
        "3.1.3-8ubuntu0.7",
        "3.1.3-8ubuntu0.8",
        "3.1.3-8ubuntu0.9",
        "3.1.3-8ubuntu0.9+esm1",
        "3.1.3-8ubuntu0.9+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "rsync",
            "binary_version": "3.2.7-0ubuntu0.22.04.7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "rsync",
        "purl": "pkg:deb/ubuntu/rsync@3.2.7-0ubuntu0.22.04.7?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.2.3-4ubuntu1",
        "3.2.3-4ubuntu2",
        "3.2.3-8ubuntu1",
        "3.2.3-8ubuntu2",
        "3.2.3-8ubuntu3",
        "3.2.3-8ubuntu3.1",
        "3.2.7-0ubuntu0.22.04.2",
        "3.2.7-0ubuntu0.22.04.3",
        "3.2.7-0ubuntu0.22.04.4",
        "3.2.7-0ubuntu0.22.04.6",
        "3.2.7-0ubuntu0.22.04.7"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "rsync",
            "binary_version": "3.2.7-1ubuntu1.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "rsync",
        "purl": "pkg:deb/ubuntu/rsync@3.2.7-1ubuntu1.5?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.2.7-1",
        "3.2.7-1build1",
        "3.2.7-1build2",
        "3.2.7-1ubuntu1",
        "3.2.7-1ubuntu1.1",
        "3.2.7-1ubuntu1.2",
        "3.2.7-1ubuntu1.4",
        "3.2.7-1ubuntu1.5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "rsync",
            "binary_version": "3.4.1+ds1-7ubuntu0.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "rsync",
        "purl": "pkg:deb/ubuntu/rsync@3.4.1+ds1-7ubuntu0.3?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.4.1+ds1-5ubuntu1",
        "3.4.1+ds1-6",
        "3.4.1+ds1-7",
        "3.4.1+ds1-7ubuntu0.2",
        "3.4.1+ds1-7ubuntu0.3"
      ]
    }
  ],
  "aliases": [],
  "details": "rsync\u00a0before 3.5.0\u00a0contains a path traversal vulnerability that allows a malicious sender to write files outside the intended destination directory tree by crafting relative paths with symlink components in --relative mode. The make_path() function follows symlinks pointing outside the destination tree while creating intermediate directories without verifying that created paths remain within the destination boundary, enabling arbitrary file writes on the receiver\u0027s filesystem.",
  "id": "UBUNTU-CVE-2026-53785",
  "modified": "2026-08-19T11:06:28Z",
  "published": "2026-08-13T15:19:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-53785"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-53785"
    },
    {
      "type": "REPORT",
      "url": "https://download.samba.org/pub/rsync/NEWS#3.5.0"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-53785"
  ]
}

CVE-2026-53785 (GCVE-0-2026-53785)

Vulnerability from cvelistv5 – Published: 2026-08-13 14:34 – Updated: 2026-08-14 16:50

Title

rsync < 3.5.0 Path Traversal Write Escape via --relative Mode

Summary

Severity

6.9 (Medium)


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

7.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-13 15:27 UTC

CWE

CWE-59 - Improper Link Resolution Before File Access ('Link Following')

Assigner

VulnCheck mitre root

References

3 references

URL	Tags
https://github.com/RsyncProject/rsync/security/ad…	vendor-advisory
https://github.com/RsyncProject/rsync/releases/ta…	release-notes
https://www.vulncheck.com/advisories/rsync-path-t…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
RsyncProject	rsync	Affected: 0 , ≤ 3.4.4 (semver) Unaffected: 3.5.0 (semver) cpe:2.3:a:samba:rsync::::::::

Credits

seks99x

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-53785",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-13T15:27:59.816121Z",
                "version": "2.0.3"
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        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/RsyncProject/rsync",
          "product": "rsync",
          "repo": "https://github.com/RsyncProject/rsync",
          "vendor": "RsyncProject",
          "versions": [
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              "lessThanOrEqual": "3.4.4",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "3.5.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "3.4.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
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          "lang": "en",
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      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
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            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
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            "valueDensity": "NOT_DEFINED",
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          "scenarios": [
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      "providerMetadata": {
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    "datePublished": "2026-08-13T14:34:59.757Z",
    "dateReserved": "2026-06-10T20:14:32.826Z",
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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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.