CVE-2026-50287

HIGHPre-NVD 8.78.7
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (43rd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated
8.7EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.7Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

AgenticMail gives AI agents real email addresses and phone numbers. Prior to version 0.9.27, @agenticmail/mcp exposes a Streamable HTTP transport when started with --http or MCP_HTTP=1. In that mode, the /mcp endpoint accepts requests without any HTTP authentication layer. A remote client can initialize a session and call tools directly. This issue has been patched in version 0.9.27.

CVSS v3
8.7
EG Score
8.7HIGHmedium confidence
EG Risk
70
EG Risk 70/100

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 (value × EchelonGraph’s weight)
Severity87% × 45%
The EG Score, 8.7 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
43rd
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (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)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (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

June 1, 2026

Last Modified

June 16, 2026

Advisory Details (1)

Auto-updated Jun 12, 2026
Patch available. Sources: github.
GitHub advisoryMentions a patch (unverified)

Missing Authentication for Critical Function in @agenticmail/mcp · Advisory · agenticmail/agenticmail · GitHub

https://github.com/agenticmail/agenticmail/security/advisories/GHSA-63gr-g7jc-v8rg

Vendor Advisories for CVE-2026-50287(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)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
@agenticmail/mcp—
  • every version up to 0.9.27: fixed in 0.9.27
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 28× 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 156 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 56 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 19:42 UTCEG score recompute
  2. 2026-10-11 16:57 UTCEG score recompute
  3. 2026-10-11 14:21 UTCEG score recompute
  4. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  7. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  8. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  9. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  10. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  11. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  12. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  13. 2026-10-03 13:39 UTCOSV refresh
  14. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  15. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  16. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  17. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  18. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  19. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  20. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  21. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  22. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  23. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  24. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  25. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 29th percentile
Show 75 more
  1. 2026-09-14 06:10 UTCEG score recompute
  2. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  3. 2026-09-13 01:06 UTCOSV refresh
  4. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  5. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  6. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  7. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  8. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  9. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  10. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  11. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  12. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  13. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  14. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  15. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  16. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  17. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  18. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  19. 2026-08-25 03:57 UTCEG score recompute
  20. 2026-08-23 13:57 UTCEG score recompute
  21. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  22. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  23. 2026-08-20 23:26 UTCEG score recompute
  24. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  25. 2026-08-20 10:18 UTCEG score recompute
  26. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  27. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  28. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  29. 2026-08-17 06:44 UTCEG score recompute
  30. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  31. 2026-08-16 04:51 UTCEG score recompute
  32. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  33. 2026-08-15 01:33 UTCEG score recompute
  34. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  35. 2026-08-13 23:21 UTCEG score recompute
  36. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  37. 2026-08-12 15:44 UTCEG score recompute
  38. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  39. 2026-08-12 02:24 UTCEG score recompute
  40. 2026-08-11 13:16 UTCEG score recompute
  41. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  42. 2026-08-09 17:53 UTCEG score recompute
  43. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  44. 2026-08-09 04:47 UTCEG score recompute
  45. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  46. 2026-08-08 02:06 UTCEG score recompute
  47. 2026-08-06 23:53 UTCEG score recompute
  48. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  49. 2026-08-05 20:40 UTCEG score recompute
  50. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  51. 2026-08-04 22:42 UTCEG score recompute
  52. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  53. 2026-08-04 10:39 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  54. 2026-08-03 15:51 UTCEG score recompute
  55. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  56. 2026-08-02 02:47 UTCEG score recompute
  57. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  58. 2026-08-01 13:40 UTCEG score recompute
  59. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  60. 2026-07-31 05:44 UTCEG score recompute
  61. 2026-07-30 16:28 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  62. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  63. 2026-07-29 11:15 UTCEG score recompute
  64. 2026-07-28 15:37 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  65. 2026-07-28 03:53 UTCEG score recompute
  66. 2026-07-26 23:44 UTCEG score recompute
  67. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  68. 2026-07-25 14:18 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  69. 2026-07-24 14:18 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  70. 2026-07-23 14:18 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  71. 2026-07-23 03:18 UTCEG score recompute
  72. 2026-07-22 14:08 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  73. 2026-07-21 15:25 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  74. 2026-07-20 17:08 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  75. 2026-07-19 14:31 UTCEPSS rescoreEPSS 0.4% · 28th percentile

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Frequently asked(5)

What is CVE-2026-50287?
CVE-2026-50287 is a high-severity vulnerability; its CVE record was published on June 1, 2026. AgenticMail gives AI agents real email addresses and phone numbers. Prior to version 0.9.27, @agenticmail/mcp exposes a Streamable HTTP transport when started with --http or MCP_HTTP=1. In that mode, the /mcp endpoint accepts requests without any HTTP authentication layer. A remote client can…
When was the CVE record for CVE-2026-50287 published?
The CVE record for CVE-2026-50287 was published on June 1, 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 June 16, 2026; the record at its source may have been updated since.
Is CVE-2026-50287 actively exploited?
CVE-2026-50287 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (43rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-50287?
CVE-2026-50287 has a CVSS base score of 8.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-50287?
A fix for CVE-2026-50287 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-50287 are linked in the Vendor Advisories panel on this page.

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