CVE-2026-48824

Mailpit is an email testing tool and API for developers. Prior to version 1.30.1, the fix for GHSA-fpxj-m5q8-fphw (CVE-2026-45710, "Mailpit: Set a default 50MB p/m limit to prevent DoS via unlimited SMTP DATA and /api/v1/send body sizes") wrapped only `POST /api/v1/send` with `http.MaxBytesReader`. The four other Mailpit JSON-body API endpoints `PUT /api/v1/messages` (SetReadStatus), `DELETE /api/v1/messages` (DeleteMessages), `PUT /api/v1/tags` (SetMessageTags), and `POST /api/v1/message/{id}/release` (ReleaseMessage) still call `json.NewDecoder(r.Body)` directly with no body-size cap and remain reachable unauthenticated in the default `docker run axllent/mailpit:latest` deploy. An unauthenticated remote attacker can post a multi-million-element `IDs` slice and drive RSS from ~25 MiB baseline to ~450 MiB per 16 MB request body. Repeating across multiple connections accumulates the same per-request amplification per process. Version 1.30.1 contains a patch.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/axllent/mailpit/releases/tag/v1.30.1	Release Notes
https://github.com/axllent/mailpit/security/advisories/GHSA-28pq-6qxg-wg5r	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:axllent:mailpit:*:*:*:*:*:*:*:*

History

28 Jul 2026, 15:24

Type	Values Removed	Values Added
References	~~() https://github.com/axllent/mailpit/releases/tag/v1.30.1 -~~	() https://github.com/axllent/mailpit/releases/tag/v1.30.1 - Release Notes
References	~~() https://github.com/axllent/mailpit/security/advisories/GHSA-28pq-6qxg-wg5r -~~	() https://github.com/axllent/mailpit/security/advisories/GHSA-28pq-6qxg-wg5r - Exploit, Vendor Advisory
First Time		Axllent mailpit Axllent
CPE		cpe:2.3:a:axllent:mailpit::::::::

20 Jul 2026, 16:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-20 16:17

Updated : 2026-07-28 15:24

NVD link : CVE-2026-48824

Mitre link : CVE-2026-48824

CVE.ORG link : CVE-2026-48824

JSON object : View

Products Affected

axllent

mailpit

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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