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: 0.1%, top 96% of all CVEs by exploit prediction. 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%CVSS: 6.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

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%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
4%
KEV
Not listed

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 rangeFixed inDependents
github.com/axllent/mailpit—1.30.6—

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 49× 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. 2026-09-18 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
Show 24 more
  1. 2026-09-02 14:12 UTCEPSS rescore
  2. 2026-09-01 17:33 UTCEG score recompute
  3. 2026-09-01 13:54 UTCEPSS rescore
  4. 2026-09-01 04:40 UTCEPSS rescore
  5. 2026-08-30 21:15 UTCEG score recompute
  6. 2026-08-30 19:17 UTCEPSS rescore
  7. 2026-08-30 01:22 UTCEPSS rescore
  8. 2026-08-29 01:27 UTCEG score recompute
  9. 2026-08-28 21:42 UTCEPSS rescore
  10. 2026-08-27 21:40 UTCEG score recompute
  11. 2026-08-26 23:47 UTCEG score recompute
  12. 2026-08-26 14:47 UTCEPSS rescore
  13. 2026-08-26 01:52 UTCEG score recompute
  14. 2026-08-25 13:49 UTCEPSS rescore
  15. 2026-08-25 03:58 UTCEG score recompute
  16. 2026-08-23 08:08 UTCEG score recompute
  17. 2026-08-23 00:19 UTCEPSS rescore
  18. 2026-08-22 10:13 UTCEG score recompute
  19. 2026-08-21 23:49 UTCEPSS rescore
  20. 2026-08-21 12:19 UTCEG score recompute
  21. 2026-08-21 11:39 UTCEG score recompute
  22. 2026-08-20 22:24 UTCEG score recompute
  23. 2026-08-20 21:42 UTCEG score recompute
  24. 2026-08-20 21:41 UTCMITRE cvelistV5first tracked

Related CVEs(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 in the National Vulnerability Database 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% probability of exploitation in the next 30 days, which ranks it in the top 95.7% of all scored CVEs.
What is the CVSS score of CVE-2026-67448?
CVE-2026-67448 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-67448?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67448, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-67448

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