Quick answers
- Is CVE-2026-114426 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-114426 being exploited in the wild.
- How severe is CVE-2026-114426?
- Informational severity, published 4 November 2026.
- Which products and versions are affected?
- Seppmail Secure Email Gateway before 15.1.1.
- Is there a fix for CVE-2026-114426?
- Yes: fixed in 15.1.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-114426 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-114426?
- Check whether you run Seppmail Secure Email Gateway at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 15.1.1
Technical details
The v1 file-interface endpoint processes and writes upload data before validating the caller's authentication credentials and lacks an absolute request-size limit, allowing an unauthenticated attacker to submit concurrent or intentionally slow requests that exhaust worker processes and fill temporary disk storage. An attacker can trigger denial of service by overwhelming the appliance with resource-consuming requests from the network. A fix is available in version 15.1.1.
Affected products
- SEPPmail Secure Email Gateway before 15.1.1
Timeline
- 2026-11-04: disclosed