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Medium

BookWyrm through 0.9.1 Missing Authorization on the Favorite and Unfavorite Endpoints

Type: advisorySource: Official CVE List1 source record

BookWyrm through 0.9.1 fails to validate user visibility permissions in the Favorite and Unfavorite views, allowing authenticated attackers to favorite or unfavorite followers-only and direct statuses they cannot access. Attackers can POST to the favorite endpoint with a status ID to create unauthorized interactions, trigger ActivityPub broadcasts, and enumerate private status IDs through response differentiation.

Announced Source revision 1
Original source ↗

CVE-2026-86112

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-86112

bookwyrm

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://github.com/bookwyrm-social/bookwyrm",
    "vendor": "bookwyrm-social",
    "product": "bookwyrm",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "versionType": "semver",
        "lessThanOrEqual": "0.9.1"
      }
    ],
    "packageURL": "pkg:github/bookwyrm-social/bookwyrm",
    "defaultStatus": "unaffected"
  }
]
Related CVEs
CVE-2026-86112

Source reference: /cveMetadata/cveId

Publisher severity

medium

Source reference: /containers/cna/metrics

Event
#1573 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement