GHSA-28pq-6qxg-wg5r: github.com/axllent/mailpit (CVE-2026-48824)

Mailpit: Sibling-endpoint memory-exhaustion DoS via unbounded JSON body on /api/v1/messages, /api/v1/tags, and /api/v1/message/{id}/release (incomplete fix of GHSA-fpxj-m5q8-fphw)

CVSS 5.3 MediumEPSS 0.0054 · 46th percentile

Published by the GitHub Advisory Database at 1 Jul 2026, 20:56 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
github.com/axllent/mailpit	Go	<1.30.1	1.30.1

Identifiers

GHSA-28pq-6qxg-wg5r · CVE-2026-48824 · GO-2026-5868

Weakness (CWE)

CWE-770

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Mailpit versions before 1.30.1 do not limit JSON request body sizes on several API endpoints. An unauthenticated remote attacker in the default configuration can exhaust memory and cause a denial of service. Upgrade to Mailpit 1.30.1.

Written 6 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
5.3	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0054, the 46th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:46 UTC First seen by agentprime
31 Oct 2026, 14:46 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.