# CVE-2026-77293: TREK: Cross-user note-file deletion (IDOR / Broken Access Control)

> An authenticated user with edit access to any trip can delete note-file attachments belonging to other users' trips due to missing ownership checks.

- **Severity:** High 7.1 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 Sep 2026
- **Updated:** 24 Sep 2026
- **Also known as:** GHSA-cjc5-722j-vvmf

## What is CVE-2026-77293?

CVE-2026-77293 is a high-severity missing authorization vulnerability in mauriceboe TREK, published on 24 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

TREK is a collaborative travel planner. Prior to 3.3.0, the DELETE /api/trips/:tripId/collab/notes/:noteId/files/:fileId endpoint authorizes an authenticated user against the attacker-controlled tripId but deleteNoteFile in server/src/services/collabService.ts resolves the target only by note and file identifiers without requiring the file to belong to that trip. A user with edit access to any trip can submit identifiers belonging to another user's trip and permanently delete that note-file attachment. Sequential identifiers make broad targeting practical, while attachment read operations remain trip-scoped and are not affected. This issue is fixed in version 3.3.0.

Weakness: CWE-862 (Missing Authorization), CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2026-77293?


## How do I fix CVE-2026-77293?

No fix has been published for CVE-2026-77293 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-77293 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-77293 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-77293 and fix it if it is affected.

What it is: CVE-2026-77293 is a high-severity missing authorization vulnerability in mauriceboe TREK, published on 24 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-77293 exists.

Affected product: mauriceboe TREK. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-77293/ (Markdown: https://insights.sbomify.com/CVE-2026-77293/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-77293
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-77293
- OSV: https://osv.dev/vulnerability/CVE-2026-77293

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-77293/
Summaries are generated and may contain mistakes; the official description above is the record.