# CVE-2026-114726: Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a mail header injection vulnerability in the Bounce (resend) action.


- **Severity:** Medium 5.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Fix available:** Yes
- **Published:** 22 Oct 2026
- **Updated:** 28 Oct 2026
- **Also known as:** DEBIAN-CVE-2026-114726, GHSA-hpmj-jmwh-pghr, UBUNTU-CVE-2026-114726

## What is CVE-2026-114726?

CVE-2026-114726 is a medium-severity vulnerability in Roundcube Webmail, published on 22 Oct 2026. 

### Official description

Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a mail header injection vulnerability in the Bounce (resend) action. rcube_mime::decode_address_list() did not strip control characters from the decoded display name, so a received message whose From display-name carries CRLF sequences in an encoded word could inject arbitrary headers into the message emitted when the user bounces it. Upstream fixed this in the commit “Fix mail header injection via the From display-name in the Bounce (resend) action”.

Weakness: CWE-99 (Improper Control of Resource Identifiers)

## Which versions are affected by CVE-2026-114726?

It affects 1 product.


Products: Roundcube Webmail.

## How do I fix CVE-2026-114726?

Upgrade to a fixed version.

## Is CVE-2026-114726 being exploited?

There is no known exploitation of CVE-2026-114726 in the wild and no public exploit code.

## Other vulnerabilities in Roundcube Webmail

- [CVE-2024-42009](https://insights.sbomify.com/CVE-2024-42009/): RoundCube Webmail Cross-Site Scripting (critical 9.3, exploited in the wild)
- [CVE-2025-68461](https://insights.sbomify.com/CVE-2025-68461/): RoundCube Webmail Cross-site Scripting (high 7.2, exploited in the wild)
- [CVE-2008-5619](https://insights.sbomify.com/CVE-2008-5619/): PHPMailer susceptible to arbitrary code execution (critical 10.0)
- [CVE-2024-37385](https://insights.sbomify.com/CVE-2024-37385/): Command injection in n/a (critical 9.8)
- [CVE-2024-42008](https://insights.sbomify.com/CVE-2024-42008/): Cross-site scripting in n/a (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-114726 and fix it if it is affected.

What it is: CVE-2026-114726 is a medium-severity vulnerability in Roundcube Webmail, published on 22 Oct 2026. 
Exploitation: There is no known exploitation of CVE-2026-114726 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-2026-114726/ (Markdown: https://insights.sbomify.com/CVE-2026-114726/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-114726
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-114726
- OSV: https://osv.dev/vulnerability/CVE-2026-114726

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-114726/
Summaries are generated and may contain mistakes; the official description above is the record.