PT-2026-41967 · Mailpit · Mailpit
CVE-2026-45712
·
Published
2026-05-19
·
Updated
2026-07-30
CVSS v3.1
5.9
Medium
| Vector | AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Mailpit (affected versions not specified)
Description
A remote, unauthenticated attacker can cause a denial of service (DoS) by crashing the Mailpit process. The issue occurs because the screenshot/print proxy reads a package-level assets cache without holding the
assetsMutex lock, while a cleanup goroutine and CSS-rewriting code path concurrently write to the same map. When an unsynchronized read coincides with a synchronized write, the Go runtime triggers a fatal error (concurrent map read and map write) that cannot be recovered, leading to the termination of the entire process, including SMTP, POP3, and HTTP listeners.Technical details include:
- API Endpoint: '/proxy'
- Vulnerable Parameter:
data
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Race Condition
Allocation of Resources Without Limits
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Related Identifiers
Affected Products
Mailpit