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CVE-2026-22689

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 inte
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:784df343ce2efa750a57c445b44de92b8dcd2f5c6d1565e0021826a3e9ee985a
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"mailpit","vendor":"axllent","versions":[{"status":"affected","version":"< 1.28.2"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:3a3d4624412eb71ea25c7231293bf83f060887389e589eb6b65537e12cdc2211 · sha256:39d7c047f84dab90… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:3a3d4624412eb71ea25c7231293bf83f060887389e589eb6b65537e12cdc2211 · sha256:39d7c047f84dab90… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-1385","description":"CWE-1385: Missing Origin Validation in WebSockets","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:3a3d4624412eb71ea25c7231293bf83f060887389e589eb6b65537e12cdc2211 · sha256:39d7c047f84dab90… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/axllent/mailpit/commit/6f1f4f34c98989fd873261018fb73830b30aec3f","tags":["x_refsource_MISC"],"url":"https://github.com/axllent/mailpit/commit/6f1f4f34c98989fd873261018fb73830b30aec3f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3a3d4624412eb71ea25c7231293bf83f060887389e589eb6b65537e12cdc2211 · sha256:39d7c047f84dab90… · /containers/cna/references/1
{"name":"https://github.com/axllent/mailpit/security/advisories/GHSA-524m-q5m7-79mm","tags":["x_refsource_CONFIRM"],"url":"https://github.com/axllent/mailpit/security/advisories/GHSA-524m-q5m7-79mm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3a3d4624412eb71ea25c7231293bf83f060887389e589eb6b65537e12cdc2211 · sha256:39d7c047f84dab90… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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