# CVE-2026-61641: Wallos: OIDC account takeover via email-based account linking without `email_verified` check

> Attackers can take over admin accounts in Wallos by exploiting OIDC email linking flaws when using IdPs that allow unverified email claims.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 31 Aug 2026
- **Updated:** 1 Sep 2026
- **Also known as:** GHSA-qwgp-m2f3-6j3r

## What is CVE-2026-61641?

CVE-2026-61641 is a high-severity authentication bypass vulnerability in ellite Wallos, published on 31 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Wallos is an open-source, self-hostable personal subscription tracker. From version 4.0.0 to before version 4.9.6, Wallos's OIDC login links an incoming OIDC identity to an existing local account by matching the email claim alone, without verifying that the IdP marked that email as verified (email_verified). When Wallos is configured against an IdP that lets a user present an arbitrary or unverified email (multi-tenant IdPs, IdPs with open self-registration, or any IdP the attacker partly controls), an attacker with no Wallos account can authenticate with the admin's email and be logged in as the admin — full account takeover, no password needed. This issue has been patched in version 4.9.6.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2026-61641?


## How do I fix CVE-2026-61641?

No fix has been published for CVE-2026-61641 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-61641 being exploited?

There is no known exploitation of CVE-2026-61641 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-61641 and fix it if it is affected.

What it is: CVE-2026-61641 is a high-severity authentication bypass vulnerability in ellite Wallos, published on 31 Aug 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-2026-61641 in the wild and no public exploit code.

Affected product: ellite Wallos. 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-2026-61641/ (Markdown: https://insights.sbomify.com/CVE-2026-61641/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-61641
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-61641
- OSV: https://osv.dev/vulnerability/CVE-2026-61641

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-61641/
Summaries are generated and may contain mistakes; the official description above is the record.