# CVE-2026-108580: AniWorld Downloader before 5.3.0 WebUI Login Brute Force via /login

> Attackers can brute-force WebUI login credentials due to missing rate limiting, leading to account takeover in AniWorld Downloader.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Oct 2026
- **Updated:** 13 Oct 2026
- **Also known as:** GHSA-cwhp-rxhr-43pp

## What is CVE-2026-108580?

CVE-2026-108580 is a medium-severity authentication bypass vulnerability in phoenixthrush AniWorld Downloader, published on 10 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

AniWorld Downloader before 5.3.0 contains an improper restriction of authentication attempts vulnerability in the WebUI /login POST handler that allows unauthenticated attackers to guess passwords without throttling. Attackers can enumerate usernames through verify_user response timing and brute-force passwords on exposed WebUI instances to take over accounts.

Weakness: CWE-307 (Improper Restriction of Excessive Authentication Attempts)

## Which versions are affected by CVE-2026-108580?


## How do I fix CVE-2026-108580?

No fix has been published for CVE-2026-108580 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-108580 being exploited?

There is no known exploitation of CVE-2026-108580 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-108580 and fix it if it is affected.

What it is: CVE-2026-108580 is a medium-severity authentication bypass vulnerability in phoenixthrush AniWorld Downloader, published on 10 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-108580 in the wild and no public exploit code.

Affected product: phoenixthrush AniWorld Downloader. 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-2026-108580/ (Markdown: https://insights.sbomify.com/CVE-2026-108580/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-108580
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-108580
- OSV: https://osv.dev/vulnerability/CVE-2026-108580

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-108580/
Summaries are generated and may contain mistakes; the official description above is the record.