CVE-2026-113386 Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 are affected by IMAP command injection.
High 7.1
Published
Updated
Check this codebase for CVE-2026-113386 and fix it if it is affected.
What it is: CVE-2026-113386 is a high-severity vulnerability in Roundcube Webmail, published on 20 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-113386 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-2026-113386/ (Markdown: https://insights.sbomify.com/CVE-2026-113386/index.md)
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-113386?
CVE-2026-113386 is a high-severity vulnerability in Roundcube Webmail, published on 20 Oct 2026.
Official description
Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 are affected by IMAP command injection. A remote authenticated attacker can exploit this via CRLF sequences injected into the _uid parameter of the mail/headers and mail/viewsource actions to execute arbitrary IMAP commands.
Weakness: CWE-93
Which versions are affected by CVE-2026-113386?
Linux distribution packages (1)
roundcubemail openSUSE:Tumbleweed | All versions | 1.6.20-1.1 |
How do I fix CVE-2026-113386?
Upgrade to a fixed version.
Is CVE-2026-113386 being exploited?
There is no known exploitation of CVE-2026-113386 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-113386, GHSA-qwfm-hv5v-vc9r, UBUNTU-CVE-2026-113386, openSUSE-SU-2026:12221-1.