# CVE-2026-33954: LinkAce discloses private notesto unauthorized authenticated users via the web link detail page

> Authenticated users can view private notes on shared links due to missing visibility checks on the web interface.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **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:** 27 Mar 2026
- **Updated:** 27 Mar 2026
- **Also known as:** GHSA-88h3-cq25-vw8q

## What is CVE-2026-33954?

CVE-2026-33954 is a medium-severity missing authorization vulnerability in Kovah LinkAce, published on 27 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

LinkAce is a self-hosted archive to collect website links. In versions prior to 2.5.3, a private note attached to a non-private link can be disclosed to a different authenticated user via the web interface. The API appears to correctly enforce note visibility, but the web link detail page renders notes without applying equivalent visibility filtering. As a result, an authenticated user who is allowed to view another user's `internal` or `public` link can read that user's `private` notes attached to the link. Version 2.5.3 patches the issue.

Weakness: CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2026-33954?

It affects 1 product.


Products: Linkace Linkace.

## How do I fix CVE-2026-33954?

No fix has been published for CVE-2026-33954 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-33954 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33954 exists.

## Other vulnerabilities in Kovah LinkAce

- [CVE-2026-27458](https://insights.sbomify.com/CVE-2026-27458/): LinkAce: Stored XSS in Atom Feed via CDATA Escape in List Description (high 8.7)
- [CVE-2025-62722](https://insights.sbomify.com/CVE-2025-62722/): LinkAce: Stored XSS Vulnerability in Link Title Field Through Social Media Sharing Feature (high 8.7)
- [CVE-2026-33953](https://insights.sbomify.com/CVE-2026-33953/): LinkAce's SSRF protection can be bypassed via internal hostname resolution in LinkAce (high 8.5)
- [CVE-2025-53838](https://insights.sbomify.com/CVE-2025-53838/): LinkAce has a Stored One Click XSS vulnerability (high 8.4)
- [CVE-2026-30953](https://insights.sbomify.com/CVE-2026-30953/): LinkAce affected by SSRF via link creation: NoPrivateIpRule not applied to LinkStoreRequest (high 7.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-33954 and fix it if it is affected.

What it is: CVE-2026-33954 is a medium-severity missing authorization vulnerability in Kovah LinkAce, published on 27 Mar 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-2026-33954 exists.

Affected product: Kovah LinkAce. 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-2026-33954/ (Markdown: https://insights.sbomify.com/CVE-2026-33954/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-33954
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-33954
- OSV: https://osv.dev/vulnerability/CVE-2026-33954

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-33954/
Summaries are generated and may contain mistakes; the official description above is the record.