Vulnerability-Lookup

PYSEC-2026-2315

Vulnerability from pysec - Published: 2026-04-15 19:16 - Updated: 2026-07-13 05:52

Details

Weblate is a web based localization tool. In versions prior to 5.17, repository-boundary validation relies on string prefix checks on resolved absolute paths. In multiple code paths, the check uses startswith against the repository root path. This is not path-segment aware and can be bypassed when the external path shares the same string prefix as the repository path (for example, repo and repo_outside). This issue has been fixed in version 5.17.

Severity

5.0 (Medium)


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

Impacted products

Name	purl
weblate	pkg:pypi/weblate

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "PyPI",
        "name": "weblate",
        "purl": "pkg:pypi/weblate"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.17"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.9",
        "2.0",
        "2.1",
        "2.10",
        "2.10.1",
        "2.11",
        "2.12",
        "2.13",
        "2.13.1",
        "2.14",
        "2.14.1",
        "2.15",
        "2.16",
        "2.17",
        "2.17.1",
        "2.18",
        "2.19",
        "2.19.1",
        "2.2",
        "2.20",
        "2.3",
        "2.4",
        "2.5",
        "2.6",
        "2.7",
        "2.8",
        "2.9",
        "3.0",
        "3.0.1",
        "3.1",
        "3.1.1",
        "3.10",
        "3.10.1",
        "3.10.2",
        "3.10.3",
        "3.11",
        "3.11.1",
        "3.11.2",
        "3.11.3",
        "3.2",
        "3.2.1",
        "3.2.2",
        "3.3",
        "3.4",
        "3.5",
        "3.5.1",
        "3.6",
        "3.6.1",
        "3.7",
        "3.7.1",
        "3.8",
        "3.9",
        "3.9.1",
        "4.0",
        "4.0.1",
        "4.0.2",
        "4.0.3",
        "4.0.4",
        "4.1",
        "4.1.1",
        "4.10",
        "4.10.1",
        "4.11",
        "4.11.1",
        "4.11.2",
        "4.12",
        "4.12.1",
        "4.12.2",
        "4.13",
        "4.13.1",
        "4.14",
        "4.14.1",
        "4.14.2",
        "4.15",
        "4.15.1",
        "4.15.2",
        "4.16",
        "4.16.1",
        "4.16.2",
        "4.16.3",
        "4.16.4",
        "4.17",
        "4.18",
        "4.18.1",
        "4.18.2",
        "4.2",
        "4.2.1",
        "4.2.2",
        "4.3",
        "4.3.1",
        "4.3.2",
        "4.4",
        "4.4.1",
        "4.4.2",
        "4.5",
        "4.5.1",
        "4.5.2",
        "4.5.3",
        "4.6",
        "4.6.1",
        "4.6.2",
        "4.7",
        "4.7.1",
        "4.7.2",
        "4.8",
        "4.8.1",
        "4.9",
        "4.9.1",
        "5.0",
        "5.0.1",
        "5.0.2",
        "5.1",
        "5.1.1",
        "5.10",
        "5.10.1",
        "5.10.2",
        "5.10.3",
        "5.10.4",
        "5.11",
        "5.11.1",
        "5.11.3",
        "5.11.4",
        "5.12.1",
        "5.12.2",
        "5.13",
        "5.13.1",
        "5.13.2",
        "5.13.3",
        "5.14",
        "5.14.1",
        "5.14.2",
        "5.14.3",
        "5.15",
        "5.15.1",
        "5.15.2",
        "5.16",
        "5.16.1",
        "5.16.2",
        "5.2",
        "5.2.1",
        "5.3",
        "5.3.1",
        "5.4",
        "5.4.1",
        "5.4.2",
        "5.4.3",
        "5.5",
        "5.5.2",
        "5.5.3",
        "5.5.4",
        "5.5.5",
        "5.6",
        "5.6.1",
        "5.6.2",
        "5.7",
        "5.7.1",
        "5.7.2",
        "5.8.1",
        "5.8.2",
        "5.8.3",
        "5.8.4",
        "5.9.1",
        "5.9.2"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-40256",
    "GHSA-ffgh-3jrf-8wvh"
  ],
  "details": "Weblate is a web based localization tool. In versions prior to 5.17, repository-boundary validation relies on string prefix checks on resolved absolute paths. In multiple code paths, the check uses startswith against the repository root path. This is not path-segment aware and can be bypassed when the external path shares the same string prefix as the repository path (for example, repo and repo_outside). This issue has been fixed in version 5.17.",
  "id": "PYSEC-2026-2315",
  "modified": "2026-07-13T05:52:33.838579Z",
  "published": "2026-04-15T19:16:37.470Z",
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/WeblateOrg/weblate/commit/e30dbcb33ae78e754ecef192d54f996b89cb4e15"
    },
    {
      "type": "FIX",
      "url": "https://github.com/WeblateOrg/weblate/security/advisories/GHSA-ffgh-3jrf-8wvh"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-40256 (GCVE-0-2026-40256)

Vulnerability from cvelistv5 – Published: 2026-04-15 18:36 – Updated: 2026-04-16 14:11

Title

Weblate: Prefix-Based Repository Boundary Check Bypass via Symlink/Junction Path Prefix Collision

Summary

Severity

5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-16 14:10 UTC

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M mitre root Scorecard

References

2 references

URL	Tags
https://github.com/WeblateOrg/weblate/security/ad…	x_refsource_CONFIRM
https://github.com/WeblateOrg/weblate/commit/e30d…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
WeblateOrg	weblate	Affected: < 5.17

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-40256",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-16T14:10:48.501718Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-16T14:11:15.386Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "weblate",
          "vendor": "WeblateOrg",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 5.17"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Weblate is a web based localization tool. In versions prior to 5.17, repository-boundary validation relies on string prefix checks on resolved absolute paths. In multiple code paths, the check uses startswith against the repository root path. This is not path-segment aware and can be bypassed when the external path shares the same string prefix as the repository path (for example, repo and repo_outside). This issue has been fixed in version 5.17."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-22",
              "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-15T18:36:44.975Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/WeblateOrg/weblate/security/advisories/GHSA-ffgh-3jrf-8wvh",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/WeblateOrg/weblate/security/advisories/GHSA-ffgh-3jrf-8wvh"
        },
        {
          "name": "https://github.com/WeblateOrg/weblate/commit/e30dbcb33ae78e754ecef192d54f996b89cb4e15",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/WeblateOrg/weblate/commit/e30dbcb33ae78e754ecef192d54f996b89cb4e15"
        }
      ],
      "source": {
        "advisory": "GHSA-ffgh-3jrf-8wvh",
        "discovery": "UNKNOWN"
      },
      "title": "Weblate: Prefix-Based Repository Boundary Check Bypass via Symlink/Junction Path Prefix Collision"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-40256",
    "datePublished": "2026-04-15T18:36:44.975Z",
    "dateReserved": "2026-04-10T17:31:45.787Z",
    "dateUpdated": "2026-04-16T14:11:15.386Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

GHSA-FFGH-3JRF-8WVH

Vulnerability from github – Published: 2026-04-16 21:08 – Updated: 2026-04-16 21:08

Summary

Weblate: Prefix-Based Repository Boundary Check Bypass via Symlink/Junction Path Prefix Collision

Details

Impact

Weblate repository-boundary validation relies on string prefix checks on resolved absolute paths. In multiple code paths, the check uses startswith against the repository root path. This is not path-segment aware and can be bypassed when the external path shares the same string prefix as the repository path (for example, repo and repo_outside).

Patches

https://github.com/WeblateOrg/weblate/pull/18847

References

Thanks to m9nx4u for reporting this issue via HackerOne.

Severity

5.0 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "weblate"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.17"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-40256"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-16T21:08:47Z",
    "nvd_published_at": "2026-04-15T19:16:37Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\nWeblate repository-boundary validation relies on string prefix checks on resolved absolute paths. In multiple code paths, the check uses startswith against the repository root path. This is not path-segment aware and can be bypassed when the external path shares the same string prefix as the repository path (for example, repo and repo_outside).\n\n### Patches\n* https://github.com/WeblateOrg/weblate/pull/18847\n\n### References\nThanks to [m9nx4u](https://hackerone.com/m9nx4u) for reporting this issue via HackerOne.",
  "id": "GHSA-ffgh-3jrf-8wvh",
  "modified": "2026-04-16T21:08:47Z",
  "published": "2026-04-16T21:08:47Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/WeblateOrg/weblate/security/advisories/GHSA-ffgh-3jrf-8wvh"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40256"
    },
    {
      "type": "WEB",
      "url": "https://github.com/WeblateOrg/weblate/pull/18847"
    },
    {
      "type": "WEB",
      "url": "https://github.com/WeblateOrg/weblate/commit/e30dbcb33ae78e754ecef192d54f996b89cb4e15"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/WeblateOrg/weblate"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Weblate: Prefix-Based Repository Boundary Check Bypass via Symlink/Junction Path Prefix Collision"
}

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.

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.

Action not permitted

PYSEC-2026-2315

CVE-2026-40256 (GCVE-0-2026-40256)

GHSA-FFGH-3JRF-8WVH

Impact

Patches

References

Tags

Sightings

Nomenclature

Related by attack behaviour