CVE-2026-81846

LOWPre-NVD 3.53.5
EchelonGraph scoreMEDIUM confidence

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

Score 3.5 from GitHub Security Advisory (severity: LOW) published 2026-09-01. A secondary CVSS source baseline 3.5; sources differ by 0.0.

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

Also known asEUVD-2026-69554 (ENISA EUVD) · GHSA-29cr-9cjx-c8cg (GitHub Security Advisories)Source: ENISA EUVD

3.5EG
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: 0.3%CVSS: 3.5Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

An authorization bypass in the runZero Platform MCP service has been resolved in version 5.1.260826.0. This issue is an instance of CWE-639: Authorization Bypass Through User-Controlled Key and has an estimated CVSS score of CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N (3.5 Low).

CVSS v3
3.5
EG Score
3.5LOWmedium confidence
EG Risk
16
EG Risk 16/100

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)
Severity35% × 45%
Impact severity (EG Severity): CVSS 3.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 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: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
19th
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 (3.5): severity, escalated by confirmed exploitation. This CVE's 3.5 is its impact severity (EG Severity), not escalated.

EG Severity
3.5 LOWCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). 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.

The CVE record names the fixed release. 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

September 1, 2026

Last Modified

September 9, 2026

Vendor Advisories for CVE-2026-81846(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 7× 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 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 101 rows on record for this CVE, as 98 entries (2 repeats merged).

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. 2 repeat rows among the latest 100 are merged into the row they repeat. The 1 oldest row on record is not shown and was not checked, so the counts can still include repeats.

  1. 2026-11-13 16:57 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  2. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  3. 2026-11-11 16:40 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  4. 2026-11-10 16:45 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  5. 2026-11-09 16:36 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  6. 2026-11-08 16:41 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  7. 2026-11-07 16:40 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  8. 2026-11-06 16:39 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  9. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  10. 2026-11-04 16:37 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  11. 2026-11-03 16:49 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  12. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  13. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  14. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  15. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  16. 2026-10-29 17:40 UTCEchelonGraph re-scored
  17. 2026-10-29 17:40 UTCGHSA enrichmentGHSA-29cr-9cjx-c8cg · GitHub severity LOW · GitHub CVSS 3.5
  18. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  19. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  20. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  21. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  22. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  23. 2026-10-25 13:58 UTCEchelonGraph re-scored
  24. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  25. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.3% · 17th percentile
Show 73 more
  1. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  2. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  3. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  4. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  5. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  6. 2026-10-18 03:09 UTCEchelonGraph re-scored
  7. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  8. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  9. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  10. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  11. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  12. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  13. 2026-10-12 14:56 UTCEchelonGraph re-scored
  14. 2026-10-11 19:20 UTCEchelonGraph re-scored
  15. 2026-10-11 16:36 UTCEchelonGraph re-scored
  16. 2026-10-11 13:54 UTCEchelonGraph re-scored
  17. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  18. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  19. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  20. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  21. 2026-10-08 00:08 UTCEchelonGraph re-scored
  22. 2026-10-08 00:08 UTCGHSA enrichmentGHSA-29cr-9cjx-c8cg · GitHub severity LOW · GitHub CVSS 3.5
  23. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  24. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  25. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  26. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  27. 2026-10-04 11:16 UTCEchelonGraph re-scored
  28. 2026-10-04 11:16 UTCGHSA enrichmentGHSA-29cr-9cjx-c8cg · GitHub severity LOW · GitHub CVSS 3.5
  29. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  30. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  31. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  32. 2026-10-01 08:52 UTCEchelonGraph re-scored
  33. 2026-10-01 08:52 UTCGHSA enrichmentGHSA-29cr-9cjx-c8cg · GitHub severity LOW · GitHub CVSS 3.5
  34. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  35. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  36. 2026-09-28 06:29 UTCEchelonGraph re-scored
  37. 2026-09-28 06:29 UTCGHSA enrichmentGHSA-29cr-9cjx-c8cg · GitHub severity LOW · GitHub CVSS 3.5
  38. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  39. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  40. 2026-09-25 04:06 UTCEchelonGraph re-scored
  41. 2026-09-25 04:06 UTCGHSA enrichmentGHSA-29cr-9cjx-c8cg · GitHub severity LOW · GitHub CVSS 3.5
  42. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  43. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  44. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  45. 2026-09-22 01:43 UTCEchelonGraph re-scored
  46. 2026-09-22 01:43 UTCGHSA enrichmentGHSA-29cr-9cjx-c8cg · GitHub severity LOW · GitHub CVSS 3.5
  47. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  48. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  49. 2026-09-18 23:19 UTCEchelonGraph re-scored
  50. 2026-09-18 23:19 UTCGHSA enrichmentGHSA-29cr-9cjx-c8cg · GitHub severity LOW · GitHub CVSS 3.5
  51. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  52. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  53. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  54. 2026-09-15 20:56 UTCEchelonGraph re-scored
  55. 2026-09-15 20:56 UTCGHSA enrichmentGHSA-29cr-9cjx-c8cg · GitHub severity LOW · GitHub CVSS 3.5
  56. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  57. 2026-09-12 18:33 UTCEchelonGraph re-scored
  58. 2026-09-12 18:33 UTCGHSA enrichmentGHSA-29cr-9cjx-c8cg · GitHub severity LOW · GitHub CVSS 3.5
  59. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  60. 2026-09-09 16:09 UTCEchelonGraph re-scored
  61. 2026-09-09 16:09 UTCGHSA enrichmentGHSA-29cr-9cjx-c8cg · GitHub severity LOW · GitHub CVSS 3.5
  62. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  63. 2026-09-08 01:50 UTCEchelonGraph re-scored
  64. 2026-09-08 01:50 UTCGHSA enrichmentGHSA-29cr-9cjx-c8cg · GitHub severity LOW · GitHub CVSS 3.5
  65. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  66. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  67. 2026-09-04 23:27 UTCEchelonGraph re-scored
  68. 2026-09-04 23:27 UTCGHSA enrichmentGHSA-29cr-9cjx-c8cg · GitHub severity LOW · GitHub CVSS 3.5
  69. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  70. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  71. 2026-09-01 20:20 UTCEchelonGraph re-scored
  72. 2026-09-01 19:46 UTCEchelonGraph re-scored
  73. 2026-09-01 19:18 UTCEchelonGraph re-scoredFirst assessed: 3.5 LOW

Frequently asked(5)

What is CVE-2026-81846?
CVE-2026-81846 is a low-severity vulnerability; its CVE record was published on September 1, 2026. An authorization bypass in the runZero Platform MCP service has been resolved in version 5.1.260826.0. This issue is an instance of CWE-639: Authorization Bypass Through User-Controlled Key and has an estimated CVSS score of CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N (3.5 Low).
When was CVE-2026-81846 made public?
CVE-2026-81846 was made public on September 1, 2026: that is the date its CVE record's CNA, runZero, Inc., gives for when the vulnerability was made public. The CVE record itself was published on September 1, 2026. EchelonGraph's copy of the record carries a last-modified date of September 9, 2026; the record at its source may have been updated since.
Is CVE-2026-81846 actively exploited?
CVE-2026-81846 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (19th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-81846?
CVE-2026-81846 has a CVSS base score of 3.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-81846?
The CVE record for CVE-2026-81846 names the fix: "An authorization bypass in the runZero Platform MCP service has been resolved in version 5.1.260826.0." The vendor advisories EchelonGraph has for CVE-2026-81846 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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