CVE-2026-67448

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (11th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Mailpit is an email testing tool and API for developers. From 1.29.0 until 1.30.6, Mailpit's server/server.go origin middleware checks the raw RequestURI for the /api/ prefix while Go's ServeMux routes using the percent-decoded URL path, and server/websockets/client.go configures websocket.Upgrader.CheckOrigin to return true. A malicious website can request /%61pi/events, skip corsOriginAccessControl(), reach the /api/events WebSocket handler, and receive live message IDs, Message-Id values, sender and recipient fields, subjects, tags, and body snippets from an unauthenticated default Mailpit instance after the user visits the site. This is a regression of the earlier WebSocket origin protection and does not affect deployments protected by --ui-auth-file. This issue is fixed in version 1.30.6.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
11th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 20, 2026

Last Modified

September 18, 2026

Advisory Details (3)

Auto-updated Aug 20, 2026
Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

Release v1.30.6 (axllent/mailpit)

Patch available: axllent/mailpit v1.30.6

https://github.com/axllent/mailpit/releases/tag/v1.30.6
github_commit

commit fbe5e006c3f1 (axllent/mailpit)

Fix landed in axllent/mailpit commit fbe5e006c3f1 — awaiting tagged release

https://github.com/axllent/mailpit/commit/fbe5e006c3f1682b819df58b4a932d7a84920be9
github Patch Available

WebSocket origin check bypass via percent-encoded path (regression of CVE-2026-22689) · Advisory · axllent/mailpit · GitHub

https://github.com/axllent/mailpit/security/advisories/GHSA-8r62-w5wh-fc5m

Vendor Advisories for CVE-2026-67448(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFix by version rangeDependents
github.com/axllent/mailpit—
  • 1.29.0 up to 1.30.6: fixed in 1.30.6
—

Weakness Classification(3)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 46× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-05 01:33 UTCEG score recompute
  2. 2026-10-04 23:22 UTCEPSS rescore
  3. 2026-10-04 03:05 UTCEG score recompute
  4. 2026-10-03 14:26 UTCEPSS rescore
  5. 2026-10-03 05:08 UTCEG score recompute
  6. 2026-10-02 17:56 UTCEPSS rescore
  7. 2026-10-02 06:48 UTCEG score recompute
  8. 2026-10-01 19:50 UTCEPSS rescore
  9. 2026-10-01 06:02 UTCEG score recompute
  10. 2026-09-30 15:03 UTCEPSS rescore
  11. 2026-09-30 08:08 UTCEG score recompute
  12. 2026-09-28 23:24 UTCEG score recompute
  13. 2026-09-28 13:52 UTCEPSS rescore
  14. 2026-09-28 00:47 UTCEG score recompute
  15. 2026-09-27 13:48 UTCEPSS rescore
  16. 2026-09-27 02:54 UTCEG score recompute
  17. 2026-09-26 15:59 UTCEPSS rescore
  18. 2026-09-25 06:06 UTCEG score recompute
  19. 2026-09-24 08:12 UTCEG score recompute
  20. 2026-09-23 17:54 UTCEPSS rescore
  21. 2026-09-23 10:18 UTCEG score recompute
  22. 2026-09-22 12:24 UTCEG score recompute
  23. 2026-09-21 14:29 UTCEG score recompute
  24. 2026-09-20 20:16 UTCEPSS rescore
  25. 2026-09-19 18:28 UTCEG score recompute
Show 49 more
  1. 2026-09-18 20:19 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 06:11 UTCEG score recompute
  4. 2026-09-17 08:17 UTCEG score recompute
  5. 2026-09-16 14:08 UTCEPSS rescore
  6. 2026-09-16 10:23 UTCEG score recompute
  7. 2026-09-16 05:15 UTCEPSS rescore
  8. 2026-09-15 12:29 UTCEG score recompute
  9. 2026-09-14 14:35 UTCEG score recompute
  10. 2026-09-11 20:50 UTCEG score recompute
  11. 2026-09-11 14:53 UTCEPSS rescore
  12. 2026-09-11 09:37 UTCEPSS rescore
  13. 2026-09-10 22:42 UTCEG score recompute
  14. 2026-09-09 01:53 UTCEG score recompute
  15. 2026-09-08 22:01 UTCEPSS rescore
  16. 2026-09-08 03:31 UTCEG score recompute
  17. 2026-09-07 16:01 UTCEPSS rescore
  18. 2026-09-07 05:36 UTCEG score recompute
  19. 2026-09-06 13:47 UTCEPSS rescore
  20. 2026-09-06 07:40 UTCEG score recompute
  21. 2026-09-05 15:31 UTCEPSS rescore
  22. 2026-09-05 09:47 UTCEG score recompute
  23. 2026-09-04 11:53 UTCEG score recompute
  24. 2026-09-04 05:07 UTCEPSS rescore
  25. 2026-09-02 16:05 UTCEG score recompute
  26. 2026-09-02 14:12 UTCEPSS rescore
  27. 2026-09-01 17:33 UTCEG score recompute
  28. 2026-09-01 13:54 UTCEPSS rescore
  29. 2026-09-01 04:40 UTCEPSS rescore
  30. 2026-08-30 21:15 UTCEG score recompute
  31. 2026-08-30 19:17 UTCEPSS rescore
  32. 2026-08-30 01:22 UTCEPSS rescore
  33. 2026-08-29 01:27 UTCEG score recompute
  34. 2026-08-28 21:42 UTCEPSS rescore
  35. 2026-08-27 21:40 UTCEG score recompute
  36. 2026-08-26 23:47 UTCEG score recompute
  37. 2026-08-26 14:47 UTCEPSS rescore
  38. 2026-08-26 01:52 UTCEG score recompute
  39. 2026-08-25 13:49 UTCEPSS rescore
  40. 2026-08-25 03:58 UTCEG score recompute
  41. 2026-08-23 08:08 UTCEG score recompute
  42. 2026-08-23 00:19 UTCEPSS rescore
  43. 2026-08-22 10:13 UTCEG score recompute
  44. 2026-08-21 23:49 UTCEPSS rescore
  45. 2026-08-21 12:19 UTCEG score recompute
  46. 2026-08-21 11:39 UTCEG score recompute
  47. 2026-08-20 22:24 UTCEG score recompute
  48. 2026-08-20 21:42 UTCEG score recompute
  49. 2026-08-20 21:41 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-67448?
CVE-2026-67448 is a medium vulnerability published on August 20, 2026. Mailpit is an email testing tool and API for developers. From 1.29.0 until 1.30.6, Mailpit's server/server.go origin middleware checks the raw RequestURI for the /api/ prefix while Go's ServeMux routes using the percent-decoded URL path, and server/websockets/client.go configures…
When was CVE-2026-67448 disclosed?
CVE-2026-67448 was first published on August 20, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67448 actively exploited?
CVE-2026-67448 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (11th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-67448?
CVE-2026-67448 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-67448?
A fix for CVE-2026-67448 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-67448 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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