CVE-2026-22689: Mailpit is vulnerable to Cross-Site WebSocket Hijacking (CSWSH) allowing unauthenticated access to emails

CVE-2026-22689 · Severity: low · CVSS 3.1 · Published 2026-01-23

Mailpit is vulnerable to Cross-Site WebSocket Hijacking (CSWSH) allowing unauthenticated access to emails in github.com/axllent/mailpit

Technologies: github.com/axllent/mailpit (Go). Vendors: Go.

Quick answers

Is CVE-2026-22689 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-22689 being exploited in the wild.
How severe is CVE-2026-22689?
Low severity, with a CVSS score of 3.1, published 23 January 2026.
Which products and versions are affected?
github.com/axllent/mailpit (Go) SEMVER:introduced=1.2.6,fixed=1.28.2.
Is there a fix for CVE-2026-22689?
Yes. github.com/axllent/mailpit (Go): upgrade to 1.28.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-22689?
Check whether you run github.com/axllent/mailpit (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • github.com/axllent/mailpit (Go): upgrade to 1.28.2 or later
    go get github.com/axllent/mailpit@v1.28.2

Affected products

  • github.com/axllent/mailpit (Go) SEMVER:introduced=1.2.6,fixed=1.28.2

Identifiers

  • CVE-2026-22689
  • GHSA-524m-q5m7-79mm
  • GO-2026-4310

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