CVE-2026-125393 MailEnable Enterprise Premium before 10.62 Heap Overflow via IMAP X-FB-FETCH
High 7.1
Published
Updated
Check this codebase for CVE-2026-125393 and fix it if it is affected.
What it is: CVE-2026-125393 is a high-severity vulnerability in MailEnable Enterprise Premium, published on 9 Nov 2026.
Exploitation: There is no known exploitation of CVE-2026-125393 in the wild and no public exploit code.
Affected product: MailEnable Enterprise Premium. 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-2026-125393/ (Markdown: https://insights.sbomify.com/CVE-2026-125393/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-125393?
CVE-2026-125393 is a high-severity vulnerability in MailEnable Enterprise Premium, published on 9 Nov 2026.
Official description
MailEnable Enterprise Premium before 10.62 contains a heap overflow vulnerability in the IMAP X-FB-FETCH command that allows authenticated users to overflow a fixed 0x400-byte heap buffer. Attackers can supply an X-FB-USER address longer than about 1016 bytes, which is formatted without a length check, to crash the IMAP service and cause denial of service.
Weakness: CWE-122
Which versions are affected by CVE-2026-125393?
How do I fix CVE-2026-125393?
No fix has been published for CVE-2026-125393 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-125393 being exploited?
There is no known exploitation of CVE-2026-125393 in the wild and no public exploit code.
Sources
Also known as GHSA-j8wv-w3cw-c6x3.