CVE-2026-41103

CRITICALPre-NVD 9.19.1
EchelonGraph scoreMEDIUM confidence

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

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-12. A secondary CVSS source baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2026-29689 (ENISA EUVD) · GHSA-w9j2-m5wx-fqq4 (GitHub Security Advisories)Source: ENISA EUVD

9.1EG
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).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 5.4%CVSS: 9.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Incorrect implementation of authentication algorithm in Microsoft SSO Plugin for Jira & Confluence allows an unauthorized attacker to elevate privileges over a network.

CVSS v3
9.1
EG Score
9.1CRITICALmedium confidence
EG Risk
58
EG Risk 58/100

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)
Severity91% × 45%
Impact severity (EG Severity): CVSS 9.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation5.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
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 none (CISA Vulnrichment) · Automatable yes (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
5.4%
EPSS %ILE
92nd
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 (9.1): severity, escalated by confirmed exploitation. This CVE's 9.1 is its impact severity (EG Severity), not escalated.

EG Severity
9.1 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
5.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). 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 low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days 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 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 none (CISA Vulnrichment) · Automatable yes (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)3 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (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

May 12, 2026

Last Modified

October 26, 2026

Advisory Details (1)

Auto-updated Sep 16, 2026
Patch available. Sources: microsoft.
MicrosoftMentions a patch (unverified)

Security Update Guide - Microsoft Security Response Center

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41103

Vendor Advisories for CVE-2026-41103(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 77× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 585 rows 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 485 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 02:42 UTCEchelonGraph re-scored
  2. 2026-11-13 02:42 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  3. 2026-11-12 16:33 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  4. 2026-11-12 02:13 UTCEchelonGraph re-scored
  5. 2026-11-12 02:13 UTCVendor advisory
  6. 2026-11-12 02:13 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  7. 2026-11-11 16:39 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  8. 2026-11-11 01:45 UTCEchelonGraph re-scored
  9. 2026-11-11 01:45 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  10. 2026-11-10 16:44 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  11. 2026-11-10 01:16 UTCEchelonGraph re-scored
  12. 2026-11-10 01:16 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  13. 2026-11-09 16:35 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  14. 2026-11-09 00:46 UTCEchelonGraph re-scored
  15. 2026-11-09 00:46 UTCVendor advisory
  16. 2026-11-09 00:46 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  17. 2026-11-08 16:39 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  18. 2026-11-08 00:17 UTCEchelonGraph re-scored
  19. 2026-11-08 00:17 UTCVendor advisory
  20. 2026-11-08 00:17 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  21. 2026-11-07 16:39 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  22. 2026-11-06 23:49 UTCEchelonGraph re-scored
  23. 2026-11-06 23:49 UTCVendor advisory
  24. 2026-11-06 23:49 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  25. 2026-11-06 16:37 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
Show 75 more
  1. 2026-11-05 23:20 UTCEchelonGraph re-scored
  2. 2026-11-05 23:20 UTCVendor advisory
  3. 2026-11-05 23:20 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  4. 2026-11-05 16:37 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  5. 2026-11-04 22:52 UTCEchelonGraph re-scored
  6. 2026-11-04 22:52 UTCVendor advisory
  7. 2026-11-04 22:52 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  8. 2026-11-04 16:35 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  9. 2026-11-03 22:23 UTCEchelonGraph re-scored
  10. 2026-11-03 22:23 UTCVendor advisory
  11. 2026-11-03 22:23 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  12. 2026-11-03 16:48 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  13. 2026-11-02 21:49 UTCEchelonGraph re-scored
  14. 2026-11-02 21:49 UTCVendor advisory
  15. 2026-11-02 21:49 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  16. 2026-11-01 21:20 UTCEchelonGraph re-scored
  17. 2026-11-01 21:20 UTCVendor advisory
  18. 2026-11-01 21:20 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  19. 2026-11-01 16:34 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  20. 2026-10-31 20:51 UTCEchelonGraph re-scored
  21. 2026-10-31 20:51 UTCVendor advisory
  22. 2026-10-31 20:51 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  23. 2026-10-31 16:32 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  24. 2026-10-30 20:22 UTCEchelonGraph re-scored
  25. 2026-10-30 20:22 UTCVendor advisory
  26. 2026-10-30 20:22 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  27. 2026-10-30 16:34 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  28. 2026-10-29 19:54 UTCEchelonGraph re-scored
  29. 2026-10-29 19:54 UTCVendor advisory
  30. 2026-10-29 19:54 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  31. 2026-10-29 16:33 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  32. 2026-10-28 19:26 UTCEchelonGraph re-scored
  33. 2026-10-28 19:25 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  34. 2026-10-28 16:32 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  35. 2026-10-27 18:57 UTCEchelonGraph re-scored
  36. 2026-10-27 18:57 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  37. 2026-10-27 16:32 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  38. 2026-10-26 18:28 UTCEchelonGraph re-scored
  39. 2026-10-26 18:28 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  40. 2026-10-26 16:31 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  41. 2026-10-25 23:58 UTCEchelonGraph re-scored
  42. 2026-10-25 23:58 UTCVendor advisory
  43. 2026-10-25 23:58 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  44. 2026-10-25 16:32 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
  45. 2026-10-25 14:30 UTCEchelonGraph re-scored
  46. 2026-10-24 23:29 UTCEchelonGraph re-scored
  47. 2026-10-24 23:29 UTCVendor advisory
  48. 2026-10-24 23:29 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  49. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  50. 2026-10-23 23:01 UTCEchelonGraph re-scored
  51. 2026-10-23 23:00 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  52. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  53. 2026-10-22 22:30 UTCEchelonGraph re-scored
  54. 2026-10-22 22:30 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  55. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  56. 2026-10-21 22:01 UTCEchelonGraph re-scored
  57. 2026-10-21 22:01 UTCVendor advisory
  58. 2026-10-21 22:01 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  59. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  60. 2026-10-20 21:33 UTCEchelonGraph re-scored
  61. 2026-10-20 21:33 UTCVendor advisory
  62. 2026-10-20 21:33 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  63. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  64. 2026-10-19 21:04 UTCEchelonGraph re-scored
  65. 2026-10-19 21:04 UTCVendor advisory
  66. 2026-10-19 21:04 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  67. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  68. 2026-10-18 19:50 UTCEchelonGraph re-scored
  69. 2026-10-18 19:50 UTCVendor advisory
  70. 2026-10-18 19:50 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  71. 2026-10-18 03:42 UTCEchelonGraph re-scored
  72. 2026-10-17 19:22 UTCEchelonGraph re-scored
  73. 2026-10-17 19:22 UTCVendor advisory
  74. 2026-10-17 19:22 UTCGHSA enrichmentGHSA-w9j2-m5wx-fqq4 · GitHub severity CRITICAL · GitHub CVSS 9.1
  75. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.8% · 55th percentile

Frequently asked(5)

What is CVE-2026-41103?
CVE-2026-41103 is a critical-severity vulnerability; its CVE record was published on May 12, 2026. Incorrect implementation of authentication algorithm in Microsoft SSO Plugin for Jira & Confluence allows an unauthorized attacker to elevate privileges over a network.
When was CVE-2026-41103 made public?
CVE-2026-41103 was made public on May 12, 2026: that is the date its CVE record's CNA, Microsoft Corporation, gives for when the vulnerability was made public. The CVE record itself was published on May 12, 2026. EchelonGraph's copy of the record carries a last-modified date of October 26, 2026; the record at its source may have been updated since.
Is CVE-2026-41103 actively exploited?
CVE-2026-41103 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5.4% probability of exploitation in the next 30 days (92nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-41103?
CVE-2026-41103 has a CVSS base score of 9.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-41103?
A fix for CVE-2026-41103 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-41103 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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