Vulnerability-Lookup

GHSA-PHG3-P22V-RP9Q

Vulnerability from github – Published: 2026-09-05 12:31 – Updated: 2026-09-05 12:31

Details

BookWyrm through 0.9.1 fails to validate user visibility permissions in the status edit endpoint, allowing authenticated attackers to read followers-only and direct-message reviews by enumerating sequential status IDs. Attackers can access the raw content of restricted statuses through the edit view, bypassing the privacy protections documented for these message types.

Severity

6.5 (Medium)


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

7.1 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-86111"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-639"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-05T10:16:40Z",
    "severity": "HIGH"
  },
  "details": "BookWyrm through 0.9.1 fails to validate user visibility permissions in the status edit endpoint, allowing authenticated attackers to read followers-only and direct-message reviews by enumerating sequential status IDs. Attackers can access the raw content of restricted statuses through the edit view, bypassing the privacy protections documented for these message types.",
  "id": "GHSA-phg3-p22v-rp9q",
  "modified": "2026-09-05T12:31:25Z",
  "published": "2026-09-05T12:31:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-86111"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bookwyrm-social/bookwyrm"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bookwyrm-social/bookwyrm/blob/v0.9.1/bookwyrm/templates/snippets/create_status/content_field.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bookwyrm-social/bookwyrm/blob/v0.9.1/bookwyrm/views/status.py"
    },
    {
      "type": "WEB",
      "url": "https://github.com/geo-chen/oss/blob/main/bookwyrm.md#finding-1-authenticated-idor-in-editstatus-exposes-private-review-comment-and-quotation-content"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/bookwyrm-through-0.9.1-insecure-direct-object-reference-in-editstatus-exposes-followers-only-and-direct-statuses"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-86111 (GCVE-0-2026-86111)

Vulnerability from cvelistv5 – Published: 2026-09-05 09:59 – Updated: 2026-09-05 09:59

Title

BookWyrm through 0.9.1 Insecure Direct Object Reference in EditStatus Exposes Followers-Only and Direct Statuses

Summary

Severity

7.1 (High)


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

6.5 (Medium)


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

CWE

CWE-639 - Authorization Bypass Through User-Controlled Key

Assigner

VulnCheck mitre root

References

5 references

URL	Tags
https://github.com/geo-chen/oss/blob/main/bookwyr…	technical-description
https://github.com/bookwyrm-social/bookwyrm/blob/…	technical-description
https://github.com/bookwyrm-social/bookwyrm/blob/…	technical-description
https://github.com/bookwyrm-social/bookwyrm	product
https://www.vulncheck.com/advisories/bookwyrm-thr…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
bookwyrm-social	bookwyrm	Affected: 0 , ≤ 0.9.1 (semver) cpe:2.3:a:joinbookwyrm:bookwyrm::::::::

Date Public

2026-09-04 00:00

Credits

George Chen

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/bookwyrm-social/bookwyrm",
          "product": "bookwyrm",
          "repo": "https://github.com/bookwyrm-social/bookwyrm",
          "vendor": "bookwyrm-social",
          "versions": [
            {
              "lessThanOrEqual": "0.9.1",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:joinbookwyrm:bookwyrm:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "0.9.1",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "George Chen"
        }
      ],
      "datePublic": "2026-09-04T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "BookWyrm through 0.9.1 fails to validate user visibility permissions in the status edit endpoint, allowing authenticated attackers to read followers-only and direct-message reviews by enumerating sequential status IDs. Attackers can access the raw content of restricted statuses through the edit view, bypassing the privacy protections documented for these message types."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "NONE"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-639",
              "description": "Authorization Bypass Through User-Controlled Key",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-05T09:59:03.330Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "Researcher write-up: finding 1",
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/geo-chen/oss/blob/main/bookwyrm.md#finding-1-authenticated-idor-in-editstatus-exposes-private-review-comment-and-quotation-content"
        },
        {
          "name": "EditStatus.get: no visibility check",
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/bookwyrm-social/bookwyrm/blob/v0.9.1/bookwyrm/views/status.py"
        },
        {
          "name": "compose template renders draft.raw_content",
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/bookwyrm-social/bookwyrm/blob/v0.9.1/bookwyrm/templates/snippets/create_status/content_field.html"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/bookwyrm-social/bookwyrm"
        },
        {
          "name": "VulnCheck Advisory: BookWyrm through 0.9.1 Insecure Direct Object Reference in EditStatus Exposes Followers-Only and Direct Statuses",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/bookwyrm-through-0.9.1-insecure-direct-object-reference-in-editstatus-exposes-followers-only-and-direct-statuses"
        }
      ],
      "title": "BookWyrm through 0.9.1 Insecure Direct Object Reference in EditStatus Exposes Followers-Only and Direct Statuses",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-86111",
    "datePublished": "2026-09-05T09:59:03.330Z",
    "dateReserved": "2026-09-05T01:59:19.212Z",
    "dateUpdated": "2026-09-05T09:59:03.330Z",
    "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.

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.

Action not permitted

GHSA-PHG3-P22V-RP9Q

CVE-2026-86111 (GCVE-0-2026-86111)

Tags

Sightings

Nomenclature