# CVE-2026-75773: karakeep-app karakeep Login Endpoint auth.ts authorize excessive authentication

> Remote attackers can bypass authentication rate limits in karakeep, facilitating brute-force attacks against login endpoints.

- **Severity:** Medium 6.3 (`CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Aug 2026
- **Updated:** 19 Aug 2026
- **Also known as:** GHSA-2ccr-52p8-6754

## What is CVE-2026-75773?

CVE-2026-75773 is a medium-severity vulnerability in karakeep-app karakeep, published on 18 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability was found in karakeep-app karakeep up to 0.32.0. The affected element is the function authorize of the file apps/web/server/auth.ts of the component Login Endpoint. The manipulation results in improper restriction of excessive authentication attempts. The attack may be performed from remote. This attack is characterized by high complexity. The exploitability is described as difficult. The exploit has been made public and could be used. Upgrading to version 0.33.0 is sufficient to fix this issue. The patch is identified as f7d042971d0d2bcc7119654830cf1eb93eabbf24. It is advisable to upgrade the affected component.

Weakness: CWE-799 (Improper Control of Interaction Frequency), CWE-307 (Improper Restriction of Excessive Authentication Attempts)

## Which versions are affected by CVE-2026-75773?


## How do I fix CVE-2026-75773?

No fix has been published for CVE-2026-75773 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-75773 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-75773 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-75773 and fix it if it is affected.

What it is: CVE-2026-75773 is a medium-severity vulnerability in karakeep-app karakeep, published on 18 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-75773 exists.

Affected product: karakeep-app karakeep. 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-2026-75773/ (Markdown: https://insights.sbomify.com/CVE-2026-75773/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-75773
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-75773
- OSV: https://osv.dev/vulnerability/CVE-2026-75773

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-75773/
Summaries are generated and may contain mistakes; the official description above is the record.