# CVE-2026-48842: SQL injection in Webmail

> Attackers can perform pre-authentication SQL injection in Roundcube Webmail via the virtuser_query plugin, potentially accessing or modifying database contents.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 25 May 2026
- **Updated:** 25 Sep 2026
- **Also known as:** DEBIAN-CVE-2026-48842, GHSA-vc2v-cxrw-6g4p, UBUNTU-CVE-2026-48842

## What is CVE-2026-48842?

CVE-2026-48842 is a high-severity SQL injection vulnerability in Roundcube Webmail, published on 25 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Roundcube Webmail 1.6.x before 1.6.16 and 1.7.x before 1.7.1 has Pre-authentication SQL injection in the virtuser_query plugin via a preg_replace() backslash escape bypass.

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

## Which versions are affected by CVE-2026-48842?


## How do I fix CVE-2026-48842?

Upgrade to a fixed version.

## Is CVE-2026-48842 being exploited?

There is no known exploitation of CVE-2026-48842 in the wild and no public exploit code.

Public exploit code:

- CVE-2026-48842 PoC — Roundcube virtuser_query pre-auth SQLi (github_poc): https://github.com/4minx/CVE-2026-48842
- Roundcube virtuser_query pre-auth SQLi (CVE-2026-48842). Python PoC — version detect, virtuser plugin, login probe. https://pocbit.org (github_poc): https://github.com/murrez/CVE-2026-48842
- CVE-2026-48842 Roundcube SQLi Verifier (github_poc): https://github.com/XsanFlip/POC-CVE-2026-48842

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-48842 and fix it if it is affected.

What it is: CVE-2026-48842 is a high-severity SQL injection vulnerability in Roundcube Webmail, published on 25 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-48842 in the wild and no public exploit code.

Affected product: Roundcube Webmail. 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-2026-48842/ (Markdown: https://insights.sbomify.com/CVE-2026-48842/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-48842
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-48842
- OSV: https://osv.dev/vulnerability/CVE-2026-48842

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-48842/
Summaries are generated and may contain mistakes; the official description above is the record.