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

CVE-2026-27808 has a CVSS 3.1 base score of 5.8 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N. EPSS exploitation probability: 0.1%.

Which versions of Mailpit are affected by CVE-2026-27808?

Organizations using Mailpit should be aware of moderate risk from CVE-2026-27808, a server-side request forgery vulnerability rated CVSS 5.8.. A patch is available.

Is there a public PoC exploit available for CVE-2026-27808?

Yes, a public proof-of-concept exploit is available for CVE-2026-27808. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-27808?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.

Mailpit CVE-2026-27808

MEDIUM

Server-Side Request Forgery (SSRF) (CWE-918)

2026-02-26 security-advisories@github.com

GHSA-mpf7-p9x7-96r3

SSRF Mailpit Suse

5.8

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

5.8 MEDIUM

AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

SUSE

MEDIUM

qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

PoC Detected

Feb 28, 2026 - 01:00 vuln.today

Public exploit code

Patch released

Feb 28, 2026 - 01:00 nvd

Patch available

CVE Published

Feb 26, 2026 - 00:16 nvd

MEDIUM 5.8

DescriptionGitHub Advisory

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.

AnalysisAI

Mailpit versions prior to 1.29.2 contain a Server-Side Request Forgery vulnerability in the Link Check API that allows unauthenticated remote attackers to perform HTTP requests to arbitrary hosts, including internal and private IP addresses. The API fails to validate or filter target URLs and returns status codes for each link, enabling non-blind SSRF attacks. Public exploit code exists for this vulnerability, affecting deployments with default configuration.

Technical ContextAI

Classified as CWE-918 (Server-Side Request Forgery (SSRF)). Affects Mailpit. 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 ful