---
title: "CVE-2026-61546: AnkiMCP - DNS Rebinding"
description: "AnkiMCP before 0.21.0 contains a DNS rebinding vulnerability caused by disabling FastMCP DNS-rebinding protection in mcp_server.py, letting remote attackers via malicious web pages read and modify local Anki data, exploit requires victim to visit a malicious web page while Anki is running."
url: https://panop.io/threat-heartbeat/CVE-2026-61546/
---

# CVE-2026-61546 AnkiMCP - DNS Rebinding

AnkiMCP before 0.21.0 contains a DNS rebinding vulnerability caused by disabling FastMCP DNS-rebinding protection in mcp\_server.py, letting remote attackers via malicious web pages read and modify local Anki data, exploit requires victim to visit a malicious web page while Anki is running.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-61546)

## Details

Type

DNS Rebinding

Impact

Information Disclosure, Data Tampering

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

28 October 2026

Updated

29 October 2026

Weakness

[CWE-346](https://cwe.mitre.org/data/definitions/346.html)

## Vendor fix

Update to version 0.21.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-61546](https://nvd.nist.gov/vuln/detail/CVE-2026-61546)
- [https://github.com/ankimcp/anki-mcp-server-addon/commit/6dcb6939b0ecc0801f45cf0d241dc946aad1654f](https://github.com/ankimcp/anki-mcp-server-addon/commit/6dcb6939b0ecc0801f45cf0d241dc946aad1654f)
- [https://github.com/ankimcp/anki-mcp-server-addon/commit/d5306ff42d68f1e3b82a96878eb059437e820316](https://github.com/ankimcp/anki-mcp-server-addon/commit/d5306ff42d68f1e3b82a96878eb059437e820316)
- [https://github.com/ankimcp/anki-mcp-server-addon/security/advisories/GHSA-j9xx-59ph-wmr6](https://github.com/ankimcp/anki-mcp-server-addon/security/advisories/GHSA-j9xx-59ph-wmr6)
- [https://github.com/ankimcp/anki-mcp-server-addon/tree/v0.21.0](https://github.com/ankimcp/anki-mcp-server-addon/tree/v0.21.0)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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