# CVE-2026-33755: Authenticated SQL Injection in Contact/query addressBookIds filter

> Authenticated users can exploit SQL injection in the JMAP Contact/query endpoint to extract session tokens and take over any user account, including administrators.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **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:** 27 Mar 2026
- **Updated:** 27 Mar 2026
- **Also known as:** GHSA-3gc4-5993-c2qc

## What is CVE-2026-33755?

CVE-2026-33755 is a high-severity SQL injection vulnerability in Intermesh groupoffice, published on 27 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.158, 25.0.92, and 26.0.17, an authenticated SQL Injection vulnerability in the JMAP `Contact/query` endpoint allows any authenticated user with basic addressbook access to extract arbitrary data from the database — including active session tokens of other users. This enables full account takeover of any user, including the System Administrator, without knowing their password. Versions 6.8.158, 25.0.92, and 26.0.17 fix the issue.

Weakness: CWE-89 (Improper Neutralization of Special Elements used in an SQL Command)

## Which versions are affected by CVE-2026-33755?

It affects 1 product.


Products: Intermesh Group-Office.

## How do I fix CVE-2026-33755?

No fix has been published for CVE-2026-33755 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-33755 being exploited?

There is no known exploitation of CVE-2026-33755 in the wild and no public exploit code.

## Other vulnerabilities in Intermesh groupoffice

- [CVE-2026-34838](https://insights.sbomify.com/CVE-2026-34838/): Group-Office: Authenticated Remote Code Execution via PHP Insecure Deserialization in `AbstractSettingsCollection` (critical 10.0)
- [CVE-2026-27947](https://insights.sbomify.com/CVE-2026-27947/): Group-Office Vulnerable to Remote Code Execution (RCE) (critical 9.4)
- [CVE-2010-3428](https://insights.sbomify.com/CVE-2010-3428/): SQL injection in n/a (high 7.5)
- [CVE-2026-27832](https://insights.sbomify.com/CVE-2026-27832/): Group-Office Has Authenticated SQL Injection in advancedQueryData.comparator (high 7.1)
- [CVE-2025-48366](https://insights.sbomify.com/CVE-2025-48366/): GroupOffice's Blind Stored XSS in Phone Number Field Enables Forced Redirect and Unauthorized Actions (medium 6.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-33755 and fix it if it is affected.

What it is: CVE-2026-33755 is a high-severity SQL injection vulnerability in Intermesh groupoffice, published on 27 Mar 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-2026-33755 in the wild and no public exploit code.

Affected product: Intermesh groupoffice. 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-2026-33755/ (Markdown: https://insights.sbomify.com/CVE-2026-33755/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-33755
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-33755
- OSV: https://osv.dev/vulnerability/CVE-2026-33755

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-33755/
Summaries are generated and may contain mistakes; the official description above is the record.