# CVE-2026-42835: Microsoft Teams for Android Information Disclosure Vulnerability

> An authorized attacker can disclose information over a network via injection in Microsoft Teams for Android.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Jun 2026
- **Updated:** 24 Sep 2026
- **Also known as:** GHSA-mqcp-h3mm-5h8v

## What is CVE-2026-42835?

CVE-2026-42835 is a high-severity vulnerability in Microsoft Teams for Android, published on 9 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Improper neutralization of special elements in output used by a downstream component ('injection') in Microsoft Teams for Android allows an authorized 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-2026-42835?

It affects 1 product.


Products: Microsoft Teams.

## How do I fix CVE-2026-42835?

No fix has been published for CVE-2026-42835 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-42835 being exploited?

There is no known exploitation of CVE-2026-42835 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Teams for Android

- [CVE-2026-65667](https://insights.sbomify.com/CVE-2026-65667/): Microsoft Teams Elevation of Privilege Vulnerability (critical 10.0)
- [CVE-2026-62896](https://insights.sbomify.com/CVE-2026-62896/): Microsoft Teams Elevation of Privilege Vulnerability (critical 9.6)
- [CVE-2026-33823](https://insights.sbomify.com/CVE-2026-33823/): Microsoft Team Events Portal Information Disclosure Vulnerability (critical 9.6)
- [CVE-2026-65767](https://insights.sbomify.com/CVE-2026-65767/): Microsoft Teams for Android Spoofing Vulnerability (high 8.8)
- [CVE-2026-65768](https://insights.sbomify.com/CVE-2026-65768/): Microsoft Teams Remote Code Execution Vulnerability (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-42835 and fix it if it is affected.

What it is: CVE-2026-42835 is a high-severity vulnerability in Microsoft Teams for Android, published on 9 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-42835 in the wild and no public exploit code.

Affected product: Microsoft Teams for Android. 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-2026-42835/ (Markdown: https://insights.sbomify.com/CVE-2026-42835/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-42835
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-42835
- OSV: https://osv.dev/vulnerability/CVE-2026-42835

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-42835/
Summaries are generated and may contain mistakes; the official description above is the record.