# CVE-2026-47644: Copilot Chat (Microsoft Edge) Information Disclosure Vulnerability

> An injection flaw in Microsoft Edge Copilot Chat allows attackers to disclose sensitive information over the network.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 4 Jun 2026
- **Updated:** 24 Sep 2026
- **Also known as:** GHSA-6w62-wfvj-6pfp

## What is CVE-2026-47644?

CVE-2026-47644 is a medium-severity vulnerability in Copilot Chat (Microsoft Edge), published on 4 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Improper neutralization of special elements in output used by a downstream component ('injection') in Copilot Chat (Microsoft Edge) allows an unauthorized attacker to disclose information over a network.

Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2026-47644?

It affects 1 product.


Products: Microsoft Copilot Chat.

## How do I fix CVE-2026-47644?

No fix has been published for CVE-2026-47644 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-47644 being exploited?

There is no known exploitation of CVE-2026-47644 in the wild and no public exploit code.

Public exploit code:

- CVE-2026-47644 ($12,000): Edge Copilot Prompt Injection Leads to Cross-Tab Data Exfiltration - PoC & full writeup (github_poc): https://github.com/songjianyang/CVE-2026-47644

## Other vulnerabilities in Copilot Chat (Microsoft Edge)

- [CVE-2026-33111](https://insights.sbomify.com/CVE-2026-33111/): Copilot Chat (Microsoft Edge) Information Disclosure Vulnerability (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-47644 and fix it if it is affected.

What it is: CVE-2026-47644 is a medium-severity vulnerability in Copilot Chat (Microsoft Edge), published on 4 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-47644 in the wild and no public exploit code.

Affected product: Copilot Chat (Microsoft Edge). 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-2026-47644/ (Markdown: https://insights.sbomify.com/CVE-2026-47644/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-47644
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-47644
- OSV: https://osv.dev/vulnerability/CVE-2026-47644

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-47644/
Summaries are generated and may contain mistakes; the official description above is the record.