Vulnerability-Lookup

OPENSUSE-SU-2026:20952-1

Vulnerability from csaf_opensuse - Published: 2026-06-11 12:45 - Updated: 2026-09-17 17:34

Summary

Security update for python-python-dotenv

Severity

Moderate

Notes

Title of the patch: Security update for python-python-dotenv

Description of the patch: This update for python-python-dotenv fixes the following issue: - CVE-2026-28684: Prior to version 1.2.2, `set_key()` and `unset_key()` in python-dotenv follow symbolic links when rewriting `.env` files, allowing a local attacker to overwrite arbitrary files via a crafted symlink (bsc#1262423).

Patchnames: openSUSE-Leap-16.0-918

CVE-2026-28684

6.6 (Medium)


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

Affected products

Recommended 1 product

Product	Identifier	Version	Remediation
Unresolved product id: openSUSE Leap 16.0:python313-python-dotenv-0:1.1.0-160000.3.1.noarch		—	Vendor Fix

Threats

Impact moderate

References

6 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/o…	self
https://bugzilla.suse.com/1262423	self
https://www.suse.com/security/cve/CVE-2026-28684/	self
https://www.suse.com/security/cve/CVE-2026-28684	external
https://bugzilla.suse.com/1262423	external

JSON

To clipboard

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}

CVE-2026-28684 (GCVE-0-2026-28684)

Vulnerability from cvelistv5 – Published: 2026-04-20 16:25 – Updated: 2026-04-20 17:43

Title

python-dotenv: Symlink following in set_key allows arbitrary file overwrite via cross-device rename fallback

Summary

python-dotenv reads key-value pairs from a .env file and can set them as environment variables. Prior to version 1.2.2, `set_key()` and `unset_key()` in python-dotenv follow symbolic links when rewriting `.env` files, allowing a local attacker to overwrite arbitrary files via a crafted symlink when a cross-device rename fallback is triggered. Users should upgrade to v.1.2.2 or, as a workaround, apply the patch manually.

Severity

6.6 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-20 17:43 UTC

CWE

CWE-59 - Improper Link Resolution Before File Access ('Link Following')
CWE-61 - UNIX Symbolic Link (Symlink) Following

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/theskumar/python-dotenv/securi…	x_refsource_CONFIRM
https://github.com/theskumar/python-dotenv/commit…	x_refsource_MISC
https://github.com/theskumar/python-dotenv/releas…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
theskumar	python-dotenv	Affected: < 1.2.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-28684",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-20T17:43:03.518532Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-20T17:43:09.477Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/theskumar/python-dotenv/security/advisories/GHSA-mf9w-mj56-hr94"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "python-dotenv",
          "vendor": "theskumar",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.2.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "python-dotenv reads key-value pairs from a .env file and can set them as environment variables. Prior to version 1.2.2, `set_key()` and `unset_key()` in python-dotenv follow symbolic links when rewriting `.env` files, allowing a local attacker to overwrite arbitrary files via a crafted symlink when a cross-device rename fallback is triggered. Users should upgrade to v.1.2.2 or, as a workaround, apply the patch manually."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 6.6,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H",
            "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-61",
              "description": "CWE-61: UNIX Symbolic Link (Symlink) Following",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-20T16:25:12.302Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/theskumar/python-dotenv/security/advisories/GHSA-mf9w-mj56-hr94",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/theskumar/python-dotenv/security/advisories/GHSA-mf9w-mj56-hr94"
        },
        {
          "name": "https://github.com/theskumar/python-dotenv/commit/790c5c02991100aa1bf41ee5330aca75edc51311",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/theskumar/python-dotenv/commit/790c5c02991100aa1bf41ee5330aca75edc51311"
        },
        {
          "name": "https://github.com/theskumar/python-dotenv/releases/tag/v1.2.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/theskumar/python-dotenv/releases/tag/v1.2.2"
        }
      ],
      "source": {
        "advisory": "GHSA-mf9w-mj56-hr94",
        "discovery": "UNKNOWN"
      },
      "title": "python-dotenv: Symlink following in set_key allows arbitrary file overwrite via cross-device rename fallback"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-28684",
    "datePublished": "2026-04-20T16:25:12.302Z",
    "dateReserved": "2026-03-02T21:43:19.927Z",
    "dateUpdated": "2026-04-20T17:43:09.477Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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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.

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OPENSUSE-SU-2026:20952-1

CVE-2026-28684 (GCVE-0-2026-28684)

Tags

Sightings

Nomenclature

Related by attack behaviour