CVE-2026-9806

MEDIUMNVD 6.36.3
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 6.3 under NVD CVSS v3. EPSS exploit probability: 0.4% (36th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
6.3EG
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: 0.4%CVSS: 6.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A stored cross-site scripting (XSS) vulnerability exists in the notification panel of CTI Transmute in versions prior to the patched release. Notification messages containing user-controlled convert names were rendered in the notification bell dropdown using innerHTML without adequate sanitization. An attacker able to create or influence a convert name that is included in a notification could inject arbitrary JavaScript, which would execute in the browser of an authenticated user when they opened the notification panel. Successful exploitation could allow the attacker to perform actions in the victim's session or access information available to the application in the browser context. The issue was remediated by constructing notification elements through DOM methods and assigning notification message content via textContent instead of innerHTML. This vulnerability was only present on a development branch.

CVSS v3
6.3
EG Score
6.3MEDIUMmedium 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)
Severity63% × 45%
Impact severity (EG Severity): CVSS 6.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 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
0.4%
EPSS %ILE
36th
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 (6.3): severity, escalated by confirmed exploitation. This CVE's 6.3 is its impact severity (EG Severity), not escalated.

EG Severity
6.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). 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: 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.

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

May 28, 2026

Last Modified

May 29, 2026

Advisory Details (1)

Auto-updated Jun 13, 2026
Patch available. Sources: github_commit.
GitHub commit Patch Available

commit cf42409badc2 (MISP/cti-transmute)

Patch available: MISP/cti-transmute v1.3 (contains commit cf42409badc2)

https://github.com/MISP/cti-transmute/commit/cf42409badc27b13d9bb644b9175aa7f27e11259

Vendor Advisories for CVE-2026-9806(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 8× in last 7d / 35× 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 219 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 119 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  2. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  3. 2026-10-18 02:56 UTCEG score recompute
  4. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  5. 2026-10-16 16:45 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  6. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  7. 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  8. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  9. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  10. 2026-10-12 14:39 UTCEG score recompute
  11. 2026-10-11 19:10 UTCEG score recompute
  12. 2026-10-11 16:25 UTCEG score recompute
  13. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  14. 2026-10-11 13:37 UTCEG score recompute
  15. 2026-10-10 20:01 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  16. 2026-10-09 20:08 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  17. 2026-10-08 17:14 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  18. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  19. 2026-10-06 15:19 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  20. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  21. 2026-10-04 23:23 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  22. 2026-10-03 16:48 UTCOSV refresh
  23. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  24. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  25. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.4% · 35th percentile
Show 75 more
  1. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  2. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  3. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  4. 2026-09-27 13:49 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  5. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  6. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  7. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  8. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  9. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  10. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  11. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  12. 2026-09-17 19:32 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  13. 2026-09-16 14:09 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  14. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  15. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  16. 2026-09-14 07:30 UTCEG score recompute
  17. 2026-09-14 07:30 UTCGHSA enrichmentGHSA-w9rm-vvqp-qq3h
  18. 2026-09-13 16:48 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  19. 2026-09-13 03:09 UTCOSV refresh
  20. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  21. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  22. 2026-09-11 09:38 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  23. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  24. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  25. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  26. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  27. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  28. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  29. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  30. 2026-08-30 19:18 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  31. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  32. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  33. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  34. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  35. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  36. 2026-08-25 05:07 UTCEG score recompute
  37. 2026-08-25 05:07 UTCGHSA enrichmentGHSA-w9rm-vvqp-qq3h
  38. 2026-08-24 14:18 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  39. 2026-08-23 14:50 UTCEG score recompute
  40. 2026-08-23 14:50 UTCGHSA enrichmentGHSA-w9rm-vvqp-qq3h
  41. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  42. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  43. 2026-08-21 20:27 UTCEG score recompute
  44. 2026-08-21 20:27 UTCGHSA enrichmentGHSA-w9rm-vvqp-qq3h
  45. 2026-08-20 22:56 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  46. 2026-08-20 11:10 UTCEG score recompute
  47. 2026-08-20 11:10 UTCGHSA enrichmentGHSA-w9rm-vvqp-qq3h
  48. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  49. 2026-08-18 13:49 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  50. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  51. 2026-08-17 09:06 UTCEG score recompute
  52. 2026-08-17 09:06 UTCGHSA enrichmentGHSA-w9rm-vvqp-qq3h
  53. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  54. 2026-08-16 02:41 UTCEG score recompute
  55. 2026-08-16 02:41 UTCGHSA enrichmentGHSA-w9rm-vvqp-qq3h
  56. 2026-08-16 02:15 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  57. 2026-08-15 01:31 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  58. 2026-08-14 12:28 UTCEG score recompute
  59. 2026-08-14 12:28 UTCGHSA enrichmentGHSA-w9rm-vvqp-qq3h
  60. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  61. 2026-08-13 10:59 UTCEG score recompute
  62. 2026-08-13 10:59 UTCGHSA enrichmentGHSA-w9rm-vvqp-qq3h
  63. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  64. 2026-08-12 09:30 UTCEG score recompute
  65. 2026-08-12 09:30 UTCGHSA enrichmentGHSA-w9rm-vvqp-qq3h
  66. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  67. 2026-08-11 06:05 UTCEG score recompute
  68. 2026-08-11 06:05 UTCGHSA enrichmentGHSA-w9rm-vvqp-qq3h
  69. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  70. 2026-08-10 04:36 UTCEG score recompute
  71. 2026-08-10 04:36 UTCGHSA enrichmentGHSA-w9rm-vvqp-qq3h
  72. 2026-08-09 13:47 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  73. 2026-08-09 03:07 UTCEG score recompute
  74. 2026-08-09 03:07 UTCGHSA enrichmentGHSA-w9rm-vvqp-qq3h
  75. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.3% · 17th percentile

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-9806?
CVE-2026-9806 is a medium-severity vulnerability; its CVE record was published on May 28, 2026. A stored cross-site scripting (XSS) vulnerability exists in the notification panel of CTI Transmute in versions prior to the patched release. Notification messages containing user-controlled convert names were rendered in the notification bell dropdown using innerHTML without adequate sanitization.…
When was the CVE record for CVE-2026-9806 published?
The CVE record for CVE-2026-9806 was published on May 28, 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 May 29, 2026; the record at its source may have been updated since.
Is CVE-2026-9806 actively exploited?
CVE-2026-9806 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (36th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-9806?
CVE-2026-9806 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-9806?
A fix for CVE-2026-9806 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-9806 are linked in the Vendor Advisories panel on this page.

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