Is CVE-2026-27808 actively exploited?

No active exploitation of CVE-2026-27808 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-27808 be exploited remotely?

Yes. CVE-2026-27808 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-27808?

CVE-2026-27808 has a CVSS score of 8.6 (HIGH) and an EPSS exploitation probability of 0.05%.

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HIGH

CVE-2026-27808

CWE-918Published: February 26, 2026· Updated: Feb 28, 2026

8.6

CVSS v3.1

EPSS:0.07%probability of exploitation in 30 daysPercentile:22.3th

Official Description

Mailpit is an email testing tool and API for developers. Prior to version 1.29.2, the Link Check API (/api/v1/message/{ID}/link-check) is vulnerable to Server-Side Request Forgery (SSRF). The server performs HTTP HEAD requests to every URL found in an email without validating target hosts or filtering private/internal IP addresses. The response returns status codes and status text per link, making this a non-blind SSRF. In the default configuration (no authentication on SMTP or API), this is fully exploitable remotely with zero user interaction. This is the same class of vulnerability that was fixed in the HTML Check API (CVE-2026-23845 / GHSA-6jxm-fv7w-rw5j) and the screenshot proxy (CVE-2026-21859 / GHSA-8v65-47jx-7mfr), but the Link Check code path was not included in either fix. Version 1.29.2 fixes this vulnerability.

NVD Source

Technical Analysis

CVE-2026-27808 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 8.6.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.