CVE-2026-67448

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 6.5 from GitHub Security Advisory (severity: MODERATE) published 2026-08-20. A secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-63668 (ENISA EUVD) · GHSA-8r62-w5wh-fc5m (GitHub Security Advisories) · GO-2026-6271 (OSV.dev)Source: ENISA EUVD

6.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • 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 29/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
12th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track 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). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 20, 2026

Last Modified

October 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 advisoryMentions a patch (unverified)

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.

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
gogithub.com/axllent/mailpit @ 1.30.6 (fixes >= 1.29.0, <= 1.30.5)—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

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 10× in last 7d / 46× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 116 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 16 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  2. 2026-11-01 07:40 UTCGHSA enrichmentGHSA-8r62-w5wh-fc5m · GitHub severity MODERATE · GitHub CVSS 6.5
  3. 2026-11-01 07:40 UTCEG score recompute
  4. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  5. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  6. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  7. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  8. 2026-10-28 04:25 UTCOSV refresh
  9. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  10. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  11. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  12. 2026-10-25 14:10 UTCEG score recompute
  13. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  14. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  15. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  16. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  17. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  18. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  19. 2026-10-18 20:36 UTCEG score recompute
  20. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  21. 2026-10-18 03:20 UTCEG score recompute
  22. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  23. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  24. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  25. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
Show 75 more
  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  3. 2026-10-12 15:45 UTCEG score recompute
  4. 2026-10-11 19:30 UTCEG score recompute
  5. 2026-10-11 16:46 UTCEG score recompute
  6. 2026-10-11 14:06 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  10. 2026-10-09 08:15 UTCEG score recompute
  11. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  12. 2026-10-08 05:12 UTCEG score recompute
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  14. 2026-10-07 01:15 UTCEG score recompute
  15. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  16. 2026-10-06 03:12 UTCEG score recompute
  17. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  18. 2026-10-05 01:33 UTCEG score recompute
  19. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  20. 2026-10-04 03:05 UTCEG score recompute
  21. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  22. 2026-10-03 05:08 UTCEG score recompute
  23. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  24. 2026-10-02 06:48 UTCEG score recompute
  25. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  26. 2026-10-01 06:02 UTCEG score recompute
  27. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  28. 2026-09-30 08:08 UTCEG score recompute
  29. 2026-09-28 23:24 UTCEG score recompute
  30. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  31. 2026-09-28 00:47 UTCEG score recompute
  32. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  33. 2026-09-27 02:54 UTCEG score recompute
  34. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  35. 2026-09-25 06:06 UTCEG score recompute
  36. 2026-09-24 08:12 UTCEG score recompute
  37. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  38. 2026-09-23 10:18 UTCEG score recompute
  39. 2026-09-22 12:24 UTCEG score recompute
  40. 2026-09-21 14:29 UTCEG score recompute
  41. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  42. 2026-09-19 18:28 UTCEG score recompute
  43. 2026-09-18 20:19 UTCEG score recompute
  44. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  45. 2026-09-18 06:11 UTCEG score recompute
  46. 2026-09-17 08:17 UTCEG score recompute
  47. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  48. 2026-09-16 10:23 UTCEG score recompute
  49. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  50. 2026-09-15 12:29 UTCEG score recompute
  51. 2026-09-14 14:35 UTCEG score recompute
  52. 2026-09-11 20:50 UTCEG score recompute
  53. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  54. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  55. 2026-09-10 22:42 UTCEG score recompute
  56. 2026-09-09 01:53 UTCEG score recompute
  57. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  58. 2026-09-08 03:31 UTCEG score recompute
  59. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  60. 2026-09-07 05:36 UTCEG score recompute
  61. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  62. 2026-09-06 07:40 UTCEG score recompute
  63. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  64. 2026-09-05 09:47 UTCEG score recompute
  65. 2026-09-04 11:53 UTCEG score recompute
  66. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  67. 2026-09-02 16:05 UTCEG score recompute
  68. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  69. 2026-09-01 17:33 UTCEG score recompute
  70. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  71. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  72. 2026-08-30 21:15 UTCEG score recompute
  73. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  74. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  75. 2026-08-29 01:27 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-67448?
CVE-2026-67448 is a medium-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-67448 published?
The CVE record for CVE-2026-67448 was published on August 20, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 18, 2026; the record at its source may have been updated since.
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 (12th 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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