CVE-2026-22689
Description
Mailpit is an email testing tool and API for developers. Prior to version 1.28.2, the Mailpit WebSocket server is configured to accept connections from any origin. This lack of Origin header validation introduces a Cross-Site WebSocket Hijacking (CSWSH) vulnerability. An attacker can host a malicious website that, when visited by a developer running Mailpit locally, establishes a WebSocket connection to the victim's Mailpit instance (default ws://localhost:8025). This allows the attacker to intercept sensitive data such as email contents, headers, and server statistics in real-time. This issue has been patched in version 1.28.2.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/axllent/mailpitGo | >= 1.2.6, < 1.28.2 | 1.28.2 |
github.com/axllent/mailpitGo | < 0.0.0-20260110031614 | 0.0.0-20260110031614 |
Affected products
5- ghsa-coords3 versionspkg:golang/github.com/axllent/mailpitpkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2016.0
>= 1.2.6, < 1.28.2+ 2 more
- (no CPE)range: >= 1.2.6, < 1.28.2
- (no CPE)range: < 0.0.20260123T022811-150000.1.140.1
- (no CPE)range: < 0.0.20260723T184607-160000.1.1
Patches
Vulnerability mechanics
References
4- github.com/axllent/mailpit/commit/6f1f4f34c98989fd873261018fb73830b30aec3fnvdPatchWEB
- github.com/axllent/mailpit/security/advisories/GHSA-524m-q5m7-79mmnvdExploitMitigationVendor AdvisoryWEB
- github.com/advisories/GHSA-524m-q5m7-79mmghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-22689ghsaADVISORY
News mentions
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