---
id: CVE-2026-119644
title: >-
  Blossom through 1.17.1 Authorization Bypass via Picture Delete and Star
  Endpoints
summary: >-
  Blossom through 1.17.1 contains an authorization bypass vulnerability that
  allows authenticated non-readonly users to modify other users' pictures by
  supplying arbitrary picture ids. Attackers can call the picture delete,
  /picture/del/ba…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L'
cvssSource: cna
cwe:
  - CWE-639
vendor: blossom-editor
product: Blossom
affected:
  - Blossom <= 1.17.1
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T21:30:11.430575Z'
exploitAvailable: true
published: '2026-10-30'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T21:30:31.603Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-119644'
references:
  - url: 'https://github.com/blossom-editor/blossom/issues/214'
  - url: >-
      https://github.com/blossom-editor/blossom/blob/v1.17.1/blossom-backend/backend/src/main/java/com/blossom/backend/server/picture/PictureService.java#L222-L232
  - url: >-
      https://github.com/blossom-editor/blossom/blob/v1.17.1/blossom-backend/backend/src/main/java/com/blossom/backend/server/picture/PictureController.java#L56-L109
  - url: 'https://hackmd.io/@hieuPenguinnn/blossom-picture-idor-cross-user-delete'
  - url: 'https://github.com/blossom-editor/blossom'
  - url: >-
      https://www.vulncheck.com/advisories/blossom-through-1.17.1-authorization-bypass-via-picture-delete-and-star-endpoints
    label: >-
      VulnCheck Advisory: Blossom through 1.17.1 Authorization Bypass via
      Picture Delete and Star Endpoints
tags:
  - cve.org
  - exploit-available
epss: 0.00326
epssPercentile: 0.25784
ingestedAt: '2026-11-05T16:07:30.284Z'
---

## Overview

Blossom through 1.17.1 contains an authorization bypass vulnerability that allows authenticated non-readonly users to modify other users' pictures by supplying arbitrary picture ids. Attackers can call the picture delete, /picture/del/batch, or /picture/star endpoints to permanently delete victims' images and stored files or change their star status.

## Affected

- `Blossom <= 1.17.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.