# CVE-2025-10470: Denial-of-Service via Magic Link Authentication in WSO2 Identity Server Allows Service Unavailability

> Attackers can cause service unavailability in WSO2 Identity Server by exploiting uncontrolled memory usage in the Magic Link authentication flow.

- **Severity:** High 8.6 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/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:** 11 May 2026
- **Updated:** 11 May 2026
- **Also known as:** GHSA-3xrw-97cx-wwgf

## What is CVE-2025-10470?

CVE-2025-10470 is a high-severity denial of service vulnerability in Wso2 Identity Server, published on 11 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Magic Link authentication flow accepts multiple invalid authentication requests without adequate rate limiting or resource control, leading to uncontrolled memory usage growth.

This vulnerability can result in a denial-of-service condition, causing service unavailability for deployments that utilize the Magic Link authenticator. The impact is limited to these specific deployments and requires repeated invalid authentication attempts to trigger.

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2025-10470?

It affects 1 product.


Products: Wso2 Identity Server.

## How do I fix CVE-2025-10470?

No fix has been published for CVE-2025-10470 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-10470 being exploited?

There is no known exploitation of CVE-2025-10470 in the wild and no public exploit code.

## Other vulnerabilities in Wso2 Identity Server

- [CVE-2016-4311](https://insights.sbomify.com/CVE-2016-4311/): Cross-site request forgery in n/a (high 8.8)
- [CVE-2025-12107](https://insights.sbomify.com/CVE-2025-12107/): Server-Side Template Injection via Velocity Template Engine in Multiple WSO2 Products Allows Remote Code Execution (high 8.4)
- [CVE-2016-4312](https://insights.sbomify.com/CVE-2016-4312/): XML external entity in n/a (high 7.5)
- [CVE-2025-10908](https://insights.sbomify.com/CVE-2025-10908/): Account Lock Bypass via Magic Link or Pass Key Authentication in WSO2 Identity Server Allows Unauthorized Access (high 7.3)
- [CVE-2025-0663](https://insights.sbomify.com/CVE-2025-0663/): Auth bypass in WSO2 Identity Server (medium 6.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-10470 and fix it if it is affected.

What it is: CVE-2025-10470 is a high-severity denial of service vulnerability in Wso2 Identity Server, published on 11 May 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-2025-10470 in the wild and no public exploit code.

Affected product: Wso2 Identity Server. 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-2025-10470/ (Markdown: https://insights.sbomify.com/CVE-2025-10470/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-10470
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-10470
- OSV: https://osv.dev/vulnerability/CVE-2025-10470

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-10470/
Summaries are generated and may contain mistakes; the official description above is the record.