CVEvulnerability

CVE-2026-45712

5.9 MEDIUM Published 2026-07-20 Modified 2026-10-24 Official page ↗
Status
Analyzed
Published
2026-07-20
Last modified
2026-10-24
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-362, CWE-770

Description

Mailpit is an email testing tool and API for developers. Prior to version 1.30.0, the screenshot/print proxy (/proxy?data=…) maintains a package-level assets map[string]MessageAssets cache, but reads the map without holding assetsMutex while a long-running cleanup goroutine and (re-entrant) CSS-rewriting code path concurrently write to it under the lock. When the unsynchronized read coincides with a synchronized write, Go's runtime raises fatal error: concurrent map read and map write — a runtime.throw that is not recoverable by http.Server's handler-panic recover. The whole Mailpit process exits, taking the SMTP, POP3 and HTTP listeners down with it. Version 1.30.0 contains a patch.

Affected configurations

• axllent mailpit (< 1.30.0)

Related

Weakness · CWE (2)

  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling weakness

References