CVE-2026-62268 (GCVE-0-2026-62268)

Vulnerability from cvelistv5 – Published: 2026-11-05 20:28 – Updated: 2026-11-09 22:53
VLAI
Title
borg extract might modify out-of-tree files when extracting maliciously crafted archives
Summary
borgbackup is an opensource, deduplicating archiver with compression and authenticated encryption. Prior to 1.4.5 and 2.0.0b22, extracting a malicious archive can follow a symlinked parent path or resolve embedded dot-dot path components and delete or overwrite files outside the extraction directory. A crafted slave hardlink can also use an attacker-controlled hardlink source outside the extraction directory and hard-link that file into the restored tree, disclosing its contents. Creating the malicious archive requires repository access and, for encrypted or authenticated repositories, the Borg key and passphrase; a victim must then extract the archive. This issue is fixed in versions 1.4.5 and 2.0.0b22.
Severity
5.3 (Medium)
CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 22:53 UTC
CWE
  • CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
borgbackup borg Affected: < 1.4.5
Affected: >= 2.0.0b1, < 2.0.0b22
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-62268",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-09T22:53:46.813570Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-11-09T22:53:59.897Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "borg",
          "vendor": "borgbackup",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.4.5"
            },
            {
              "status": "affected",
              "version": "\u003e= 2.0.0b1, \u003c 2.0.0b22"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "borgbackup is an opensource, deduplicating archiver with compression and authenticated encryption. Prior to 1.4.5 and 2.0.0b22, extracting a malicious archive can follow a symlinked parent path or resolve embedded dot-dot path components and delete or overwrite files outside the extraction directory. A crafted slave hardlink can also use an attacker-controlled hardlink source outside the extraction directory and hard-link that file into the restored tree, disclosing its contents. Creating the malicious archive requires repository access and, for encrypted or authenticated repositories, the Borg key and passphrase; a victim must then extract the archive. This issue is fixed in versions 1.4.5 and 2.0.0b22."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "LOCAL",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "HIGH",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "ACTIVE",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-59",
              "description": "CWE-59: Improper Link Resolution Before File Access (\u0027Link Following\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-05T20:28:48.031Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/borgbackup/borg/security/advisories/GHSA-gfp8-w835-v44j",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/borgbackup/borg/security/advisories/GHSA-gfp8-w835-v44j"
        },
        {
          "name": "https://github.com/borgbackup/borg/commit/0ac568e290518c3bbe781459978720dde7fab224",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/borgbackup/borg/commit/0ac568e290518c3bbe781459978720dde7fab224"
        },
        {
          "name": "https://github.com/borgbackup/borg/commit/141888f2fabcd57a300547c2aa63212cb213924d",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/borgbackup/borg/commit/141888f2fabcd57a300547c2aa63212cb213924d"
        },
        {
          "name": "https://github.com/borgbackup/borg/commit/2d632531028b09da8ab5d1450f89bebcc205d640",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/borgbackup/borg/commit/2d632531028b09da8ab5d1450f89bebcc205d640"
        },
        {
          "name": "https://github.com/borgbackup/borg/commit/3e9ed6d1ad6d3531b39c07b8ef3ecf41fce4437f",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/borgbackup/borg/commit/3e9ed6d1ad6d3531b39c07b8ef3ecf41fce4437f"
        },
        {
          "name": "https://github.com/borgbackup/borg/commit/4f37fdfed10b50559a0dd333b0d5581c642af329",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/borgbackup/borg/commit/4f37fdfed10b50559a0dd333b0d5581c642af329"
        },
        {
          "name": "https://github.com/borgbackup/borg/commit/d907f2cb57337041c4fa55ca4682895535e5076b",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/borgbackup/borg/commit/d907f2cb57337041c4fa55ca4682895535e5076b"
        },
        {
          "name": "https://github.com/borgbackup/borg/releases/tag/1.4.5",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/borgbackup/borg/releases/tag/1.4.5"
        },
        {
          "name": "https://github.com/borgbackup/borg/releases/tag/2.0.0b22",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/borgbackup/borg/releases/tag/2.0.0b22"
        }
      ],
      "source": {
        "advisory": "GHSA-gfp8-w835-v44j",
        "discovery": "UNKNOWN"
      },
      "title": "borg extract might modify out-of-tree files when extracting maliciously crafted archives"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-62268",
    "datePublished": "2026-11-05T20:28:48.031Z",
    "dateReserved": "2026-07-13T17:09:57.574Z",
    "dateUpdated": "2026-11-09T22:53:59.897Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    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.