CVE-2026-90449

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

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

Score 6.5 from GitHub Security Advisory (severity: MODERATE) published 2026-09-12. A secondary CVSS source baseline 6.5; sources differ by 0.0.

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

Also known asEUVD-2026-76744 (ENISA EUVD) · GHSA-339x-r4hv-hwwx (GitHub Security Advisories)Source: ENISA EUVD

6.5EG
EchelonGraph verdictMonitorNo fix is confirmed yet: check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 6.5Exploit: None knownExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

The CVE record's CNA (Cybersecurity and Infrastructure Security Agency (CISA) Industrial Control Systems (ICS)) lists CISA Malcolm versions before v26.06.0 as affected, and CISA Malcolm versions v26.06.0 as unaffected. No release containing a fix is confirmed on record.

When a particular authentication mode is configured, the reverse proxy forwards requests for a bundled third-party administrative interface directly to that interface without applying the gateway's own authentication requirement first. All access control for this administrative interface, which manages the credential store used to gate every other service in the deployment, is delegated entirely to that third-party interface's own login mechanism. Any authentication weakness in that bundled interface would compromise the credential store protecting the rest of the deployment.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
44
EG Risk 44/100

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)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 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 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: No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high.
EPSS PROB
0.2%
EPSS %ILE
10th
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 (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-07). 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: 14 days if the affected system is publicly exposed; 60 days if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.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).

No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high.

Exploitation none (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.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.

The score's inputs: 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

September 11, 2026

Last Modified

October 2, 2026

Vendor Advisories for CVE-2026-90449(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 / 33× 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 140 rows on record for this CVE, as 99 entries (1 repeat 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 40 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:35 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  2. 2026-11-11 16:41 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  3. 2026-11-10 16:46 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  4. 2026-11-09 16:36 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  5. 2026-11-08 16:41 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  6. 2026-11-07 19:10 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx · GitHub severity MODERATE · GitHub CVSS 6.5
  7. 2026-11-07 19:10 UTCEchelonGraph re-scored
  8. 2026-11-07 16:40 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  9. 2026-11-06 16:39 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  10. 2026-11-05 16:39 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  11. 2026-11-04 16:37 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  12. 2026-11-03 16:49 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  13. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  14. 2026-11-01 16:36 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  15. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  16. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  17. 2026-10-29 22:25 UTCOSV refresh
  18. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  19. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  20. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  21. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  22. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  23. 2026-10-25 13:52 UTCEchelonGraph re-scored
  24. 2026-10-24 16:34 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  25. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.2% · 9th percentile
Show 74 more
  1. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  2. 2026-10-22 12:31 UTCEchelonGraph re-scored
  3. 2026-10-22 12:31 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx · GitHub CVSS 6.5
  4. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  5. 2026-10-20 16:34 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  6. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  7. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  8. 2026-10-18 03:01 UTCEchelonGraph re-scored
  9. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  10. 2026-10-16 16:45 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  11. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  12. 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  13. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  14. 2026-10-12 14:46 UTCEchelonGraph re-scored
  15. 2026-10-12 09:11 UTCEchelonGraph re-scored
  16. 2026-10-12 09:11 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx · GitHub CVSS 6.5
  17. 2026-10-11 19:14 UTCEchelonGraph re-scored
  18. 2026-10-11 16:30 UTCEchelonGraph re-scored
  19. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  20. 2026-10-11 13:45 UTCEchelonGraph re-scored
  21. 2026-10-11 06:46 UTCEchelonGraph re-scored
  22. 2026-10-11 06:45 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx · GitHub CVSS 6.5
  23. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  24. 2026-10-10 04:53 UTCEchelonGraph re-scored
  25. 2026-10-10 04:53 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx · GitHub CVSS 6.5
  26. 2026-10-09 20:08 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  27. 2026-10-09 07:04 UTCEchelonGraph re-scored
  28. 2026-10-09 07:04 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx · GitHub CVSS 6.5
  29. 2026-10-08 17:14 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  30. 2026-10-08 09:26 UTCEchelonGraph re-scored
  31. 2026-10-08 09:26 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx · GitHub CVSS 6.5
  32. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  33. 2026-10-07 11:48 UTCEchelonGraph re-scored
  34. 2026-10-07 11:48 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx · GitHub CVSS 6.5
  35. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  36. 2026-10-06 13:58 UTCEchelonGraph re-scored
  37. 2026-10-06 13:58 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx · GitHub CVSS 6.5
  38. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  39. 2026-10-05 16:21 UTCEchelonGraph re-scored
  40. 2026-10-05 16:21 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx · GitHub CVSS 6.5
  41. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  42. 2026-10-04 18:02 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx · GitHub CVSS 6.5
  43. 2026-10-03 19:58 UTCEchelonGraph re-scored
  44. 2026-10-03 19:58 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx · GitHub CVSS 6.5
  45. 2026-10-02 22:21 UTCEchelonGraph re-scored
  46. 2026-10-02 22:21 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx
  47. 2026-10-02 21:25 UTCEchelonGraph re-scored▼ 0.40
  48. 2026-10-02 21:24 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx
  49. 2026-10-02 21:20 UTCMITRE cvelistV5CVSS v3 → 6.5
  50. 2026-10-02 09:06 UTCEchelonGraph re-scored
  51. 2026-10-02 09:06 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx
  52. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  53. 2026-10-01 11:28 UTCEchelonGraph re-scored
  54. 2026-10-01 11:28 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx
  55. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  56. 2026-09-30 13:52 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx
  57. 2026-09-29 16:15 UTCEchelonGraph re-scored
  58. 2026-09-29 16:14 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx
  59. 2026-09-28 18:36 UTCEchelonGraph re-scored
  60. 2026-09-28 18:36 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx
  61. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  62. 2026-09-27 20:25 UTCEchelonGraph re-scored
  63. 2026-09-27 20:25 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx
  64. 2026-09-27 13:49 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  65. 2026-09-26 22:47 UTCEchelonGraph re-scored
  66. 2026-09-26 22:47 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx
  67. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  68. 2026-09-26 01:11 UTCEchelonGraph re-scored
  69. 2026-09-26 01:10 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx
  70. 2026-09-25 03:10 UTCEchelonGraph re-scored
  71. 2026-09-25 03:10 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx
  72. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  73. 2026-09-24 05:33 UTCGHSA enrichmentGHSA-339x-r4hv-hwwx
  74. 2026-09-23 07:56 UTCEchelonGraph re-scored

Frequently asked(5)

What is CVE-2026-90449?
CVE-2026-90449 is a medium-severity vulnerability; its CVE record was published on September 11, 2026. When a particular authentication mode is configured, the reverse proxy forwards requests for a bundled third-party administrative interface directly to that interface without applying the gateway's own authentication requirement first. All access control for this administrative interface, which…
When was the CVE record for CVE-2026-90449 published?
The CVE record for CVE-2026-90449 was published on September 11, 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 October 2, 2026; the record at its source may have been updated since.
Is CVE-2026-90449 actively exploited?
CVE-2026-90449 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (10th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-90449?
CVE-2026-90449 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-90449?
No fix for CVE-2026-90449 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The CVE record's CNA (Cybersecurity and Infrastructure Security Agency (CISA) Industrial Control Systems (ICS)) lists CISA Malcolm versions before v26.06.0 as affected, and CISA Malcolm versions v26.06.0 as unaffected. No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-90449 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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