CVE-2026-12112

HIGHPre-NVD 7.87.8
EchelonGraph scoreMEDIUM confidence

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

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-23. A secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in the foreman-mcp-server. A session management vulnerability in the MCP Server allows unauthenticated attackers to hijack active administrative sessions due to an improper cache of authenticated client connections, by trusting a non-secret session ID without re-validating authentication tokens and by logging all newly created session IDs to standard logs. This issue can result in privilege escalation and infrastructure-wide code execution.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

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)
Severity78% × 45%
The EG Score, 7.8 of 10.
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 low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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
11th
KEV
Not listed

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

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (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 23, 2026

Last Modified

July 16, 2026

Advisory Details (3)

Auto-updated Jun 24, 2026
Patch available. Sources: redhat.
Red Hat

2488031 – (CVE-2026-12112) CVE-2026-12112 foreman-mcp-server: MCP Server: Active Session Hijacking via Insecure Session State Reuse

https://bugzilla.redhat.com/show_bug.cgi?id=2488031
Red HatMentions a patch (unverified)

cve-details

https://access.redhat.com/security/cve/CVE-2026-12112
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:28438

Vendor Advisories for CVE-2026-12112(3)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatsatellite/foreman-mcp-server-rhel9:17822284272026-06-23redhat
redhatsatellite/foreman-mcp-server-rhel9:17822286922026-06-23redhat

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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 31× 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 344 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 244 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  2. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  3. 2026-10-12 16:36 UTCEG score recompute
  4. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  5. 2026-10-11 20:12 UTCEG score recompute
  6. 2026-10-11 18:24 UTCEG score recompute
  7. 2026-10-11 14:58 UTCEG score recompute
  8. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  9. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  10. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  11. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  12. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  13. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  14. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  15. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  16. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  17. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  18. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  19. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  20. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  21. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  22. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  23. 2026-09-23 11:57 UTCEG score recompute
  24. 2026-09-23 11:57 UTCVendor advisory
  25. 2026-09-23 11:57 UTCGHSA enrichmentGHSA-6v32-2jc8-w595 · GitHub severity HIGH · GitHub CVSS 7.8
Show 75 more
  1. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  2. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  3. 2026-09-18 10:22 UTCEG score recompute
  4. 2026-09-18 10:22 UTCVendor advisory
  5. 2026-09-18 10:22 UTCGHSA enrichmentGHSA-6v32-2jc8-w595 · GitHub severity HIGH · GitHub CVSS 7.8
  6. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  7. 2026-09-14 02:05 UTCEG score recompute
  8. 2026-09-14 02:05 UTCVendor advisory
  9. 2026-09-14 02:04 UTCGHSA enrichmentGHSA-6v32-2jc8-w595 · GitHub severity HIGH · GitHub CVSS 7.8
  10. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  11. 2026-09-13 12:21 UTCEG score recompute
  12. 2026-09-13 12:21 UTCVendor advisory
  13. 2026-09-13 12:21 UTCGHSA enrichmentGHSA-6v32-2jc8-w595 · GitHub severity HIGH · GitHub CVSS 7.8
  14. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  15. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  16. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  17. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  18. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  19. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  20. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  21. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  22. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  23. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  24. 2026-08-30 20:25 UTCEG score recompute
  25. 2026-08-30 20:25 UTCVendor advisory
  26. 2026-08-30 20:24 UTCGHSA enrichmentGHSA-6v32-2jc8-w595 · GitHub severity HIGH · GitHub CVSS 7.8
  27. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  28. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  29. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  30. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  31. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  32. 2026-08-24 22:05 UTCEG score recompute
  33. 2026-08-24 22:05 UTCVendor advisory
  34. 2026-08-24 22:05 UTCGHSA enrichmentGHSA-6v32-2jc8-w595 · GitHub severity HIGH · GitHub CVSS 7.8
  35. 2026-08-24 04:43 UTCVendor advisory
  36. 2026-08-24 04:43 UTCGHSA enrichmentGHSA-6v32-2jc8-w595 · GitHub severity HIGH · GitHub CVSS 7.8
  37. 2026-08-23 14:09 UTCVendor advisory
  38. 2026-08-23 14:09 UTCGHSA enrichmentGHSA-6v32-2jc8-w595 · GitHub severity HIGH · GitHub CVSS 7.8
  39. 2026-08-23 02:07 UTCEG score recompute
  40. 2026-08-23 02:07 UTCVendor advisory
  41. 2026-08-23 02:07 UTCGHSA enrichmentGHSA-6v32-2jc8-w595 · GitHub severity HIGH · GitHub CVSS 7.8
  42. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  43. 2026-08-22 13:44 UTCEG score recompute
  44. 2026-08-22 13:44 UTCVendor advisory
  45. 2026-08-22 13:44 UTCGHSA enrichmentGHSA-6v32-2jc8-w595 · GitHub severity HIGH · GitHub CVSS 7.8
  46. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  47. 2026-08-21 19:51 UTCVendor advisory
  48. 2026-08-21 19:51 UTCGHSA enrichmentGHSA-6v32-2jc8-w595 · GitHub severity HIGH · GitHub CVSS 7.8
  49. 2026-08-21 07:49 UTCEG score recompute
  50. 2026-08-21 07:49 UTCVendor advisory
  51. 2026-08-21 07:49 UTCGHSA enrichmentGHSA-6v32-2jc8-w595 · GitHub severity HIGH · GitHub CVSS 7.8
  52. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  53. 2026-08-20 19:47 UTCVendor advisory
  54. 2026-08-20 19:47 UTCGHSA enrichmentGHSA-6v32-2jc8-w595 · GitHub severity HIGH · GitHub CVSS 7.8
  55. 2026-08-20 07:45 UTCEG score recompute
  56. 2026-08-20 07:45 UTCVendor advisory
  57. 2026-08-20 07:45 UTCGHSA enrichmentGHSA-6v32-2jc8-w595 · GitHub severity HIGH · GitHub CVSS 7.8
  58. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  59. 2026-08-19 04:47 UTCEG score recompute
  60. 2026-08-19 04:47 UTCVendor advisory
  61. 2026-08-19 04:47 UTCGHSA enrichmentGHSA-6v32-2jc8-w595 · GitHub severity HIGH · GitHub CVSS 7.8
  62. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  63. 2026-08-17 09:52 UTCVendor advisory
  64. 2026-08-17 09:52 UTCGHSA enrichmentGHSA-6v32-2jc8-w595 · GitHub severity HIGH · GitHub CVSS 7.8
  65. 2026-08-16 21:50 UTCEG score recompute
  66. 2026-08-16 21:50 UTCVendor advisory
  67. 2026-08-16 21:50 UTCGHSA enrichmentGHSA-6v32-2jc8-w595 · GitHub severity HIGH · GitHub CVSS 7.8
  68. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  69. 2026-08-16 09:48 UTCEG score recompute
  70. 2026-08-16 09:48 UTCVendor advisory
  71. 2026-08-16 09:48 UTCGHSA enrichmentGHSA-6v32-2jc8-w595 · GitHub severity HIGH · GitHub CVSS 7.8
  72. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  73. 2026-08-15 21:46 UTCVendor advisory
  74. 2026-08-15 21:46 UTCGHSA enrichmentGHSA-6v32-2jc8-w595 · GitHub severity HIGH · GitHub CVSS 7.8
  75. 2026-08-15 09:44 UTCEG score recompute

Related CVEs(same vendor + same CWE)

Same vendor

2 shown

redhat:RHSA-2026:28405

Frequently asked(5)

What is CVE-2026-12112?
CVE-2026-12112 is a high-severity vulnerability; its CVE record was published on June 23, 2026. A flaw was found in the foreman-mcp-server. A session management vulnerability in the MCP Server allows unauthenticated attackers to hijack active administrative sessions due to an improper cache of authenticated client connections, by trusting a non-secret session ID without re-validating…
When was CVE-2026-12112 made public?
CVE-2026-12112 was made public on June 23, 2026: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on June 23, 2026. EchelonGraph's copy of the record carries a last-modified date of July 16, 2026; the record at its source may have been updated since.
Is CVE-2026-12112 actively exploited?
CVE-2026-12112 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-2026-12112?
CVE-2026-12112 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-12112?
A fix for CVE-2026-12112 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-12112 are linked in the Vendor Advisories panel on this page.

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