CVE-2026-49973

CRITICALPre-NVD 9.49.4
EchelonGraph scoreMEDIUM confidence

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

Score 9.4 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-11. The CNA's CVSS baseline 9.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory
Elevated

Also known asEUVD-2026-36306 (ENISA EUVD) · GHSA-p52p-4vmg-4vq3 (GitHub Security Advisories)Source: ENISA EUVD

9.4EG
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).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 9.4Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

Hermes WebUI before version 0.51.358 contains an improper access control vulnerability that allows unauthenticated remote attackers to hijack initial setup by submitting the _set_password parameter to the settings API endpoint without any network origin restriction. Attackers on any reachable network can send a POST request to the settings endpoint during the first-run setup window to persist an arbitrary password hash, obtain a valid session cookie, and lock out the legitimate operator from their own instance.

CVSS v3
9.4
EG Score
9.4CRITICALmedium confidence
EG Risk
73
EG Risk 73/100

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)
Severity94% × 45%
Impact severity (EG Severity): CVSS 9.4 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (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
0.5%
EPSS %ILE
46th
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 (9.4): severity, escalated by confirmed exploitation. This CVE's 9.4 is its impact severity (EG Severity), not escalated.

EG Severity
9.4 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.5% 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, Track* at medium and Attend at high mission impact.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, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (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

June 11, 2026

Last Modified

November 8, 2026

Advisory Details (5)

Auto-updated Oct 2, 2026
Patch available. Sources: github_commit, github_pr, github_release.
GitHub pull request

[security] fix(settings): gate first password setup to local clients

Upstream fix in progress (PR #3964 · nesquena/hermes-webui, state=closed)

https://github.com/nesquena/hermes-webui/pull/3964
Web page

Hermes WebUI < 0.51.358 Unauthenticated Password Takeover via /api/settings | Advisories | VulnCheck

https://www.vulncheck.com/advisories/hermes-webui-unauthenticated-password-takeover-via-api-settings
GitHub release Patch Available

v0.51.358

Patch available: nesquena/hermes-webui v0.51.358

https://github.com/nesquena/hermes-webui/releases/tag/v0.51.358
GitHub pull request Patch Available

Release LV — v0.51.358 (first-run password bootstrap hardening, #3964)

Patch available: nesquena/hermes-webui exp-v0.52.375 (PR #3973 merged 2026-06-11)

https://github.com/nesquena/hermes-webui/pull/3973
GitHub commit Patch Available

commit 1126e541325d (nesquena/hermes-webui)

Patch available: nesquena/hermes-webui exp-v0.52.375 (contains commit 1126e541325d)

https://github.com/nesquena/hermes-webui/commit/1126e541325d401538f6a272a9c024c37d47ae08

Vendor Advisories for CVE-2026-49973(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 14× in last 7d / 61× 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 564 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 464 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:53 UTCEPSS rescoreEPSS 0.5% · 46th percentile
  2. 2026-11-13 15:01 UTCEchelonGraph re-scored
  3. 2026-11-13 15:01 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  4. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.5% · 46th percentile
  5. 2026-11-12 14:51 UTCEchelonGraph re-scored
  6. 2026-11-12 14:51 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  7. 2026-11-11 16:39 UTCEPSS rescoreEPSS 0.5% · 46th percentile
  8. 2026-11-11 14:42 UTCEchelonGraph re-scored
  9. 2026-11-11 14:42 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  10. 2026-11-10 16:44 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  11. 2026-11-10 14:33 UTCEchelonGraph re-scored
  12. 2026-11-10 14:33 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  13. 2026-11-09 16:35 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  14. 2026-11-09 14:24 UTCEchelonGraph re-scored
  15. 2026-11-09 14:24 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  16. 2026-11-08 16:39 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  17. 2026-11-08 14:16 UTCEchelonGraph re-scored
  18. 2026-11-08 14:16 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  19. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  20. 2026-11-07 15:17 UTCEchelonGraph re-scored
  21. 2026-11-07 15:17 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  22. 2026-11-06 16:38 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  23. 2026-11-06 15:08 UTCEchelonGraph re-scored
  24. 2026-11-06 15:08 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  25. 2026-11-06 10:55 UTCOSV refresh
Show 75 more
  1. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  2. 2026-11-05 14:59 UTCEchelonGraph re-scored
  3. 2026-11-05 14:59 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  4. 2026-11-04 16:35 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  5. 2026-11-04 14:50 UTCEchelonGraph re-scored
  6. 2026-11-04 14:50 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  7. 2026-11-03 16:48 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  8. 2026-11-03 14:40 UTCEchelonGraph re-scored
  9. 2026-11-03 14:40 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  10. 2026-11-02 16:45 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  11. 2026-11-02 14:11 UTCEchelonGraph re-scored
  12. 2026-11-02 14:11 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  13. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  14. 2026-11-01 14:02 UTCEchelonGraph re-scored
  15. 2026-11-01 14:02 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  16. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  17. 2026-10-31 13:53 UTCEchelonGraph re-scored
  18. 2026-10-31 13:53 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  19. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  20. 2026-10-30 13:43 UTCEchelonGraph re-scored
  21. 2026-10-30 13:43 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  22. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  23. 2026-10-29 13:19 UTCEchelonGraph re-scored
  24. 2026-10-29 13:19 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  25. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  26. 2026-10-28 13:08 UTCEchelonGraph re-scored
  27. 2026-10-28 13:08 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  28. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  29. 2026-10-27 12:56 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  30. 2026-10-27 11:35 UTCEchelonGraph re-scored
  31. 2026-10-27 11:35 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  32. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  33. 2026-10-26 11:26 UTCEchelonGraph re-scored
  34. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  35. 2026-10-25 14:22 UTCEchelonGraph re-scored
  36. 2026-10-25 12:24 UTCEchelonGraph re-scored
  37. 2026-10-25 12:24 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  38. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  39. 2026-10-24 12:15 UTCEchelonGraph re-scored
  40. 2026-10-24 12:15 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  41. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  42. 2026-10-23 12:06 UTCEchelonGraph re-scored
  43. 2026-10-23 12:05 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  44. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  45. 2026-10-22 11:54 UTCEchelonGraph re-scored
  46. 2026-10-22 11:54 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  47. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  48. 2026-10-21 11:45 UTCEchelonGraph re-scored
  49. 2026-10-21 11:45 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  50. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  51. 2026-10-20 11:36 UTCEchelonGraph re-scored
  52. 2026-10-20 11:35 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  53. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  54. 2026-10-19 11:26 UTCEchelonGraph re-scored
  55. 2026-10-19 11:25 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  56. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  57. 2026-10-18 09:03 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  58. 2026-10-18 03:33 UTCEchelonGraph re-scored
  59. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  60. 2026-10-17 07:39 UTCEchelonGraph re-scored
  61. 2026-10-17 07:38 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  62. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  63. 2026-10-16 07:28 UTCEchelonGraph re-scored
  64. 2026-10-16 07:28 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  65. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  66. 2026-10-15 06:21 UTCEchelonGraph re-scored
  67. 2026-10-15 06:20 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  68. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  69. 2026-10-14 02:02 UTCEchelonGraph re-scored
  70. 2026-10-14 02:02 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  71. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  72. 2026-10-12 22:20 UTCEchelonGraph re-scored
  73. 2026-10-12 22:19 UTCGHSA enrichmentGHSA-p52p-4vmg-4vq3 · GitHub severity CRITICAL · GitHub CVSS 9.4
  74. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  75. 2026-10-12 15:59 UTCEchelonGraph re-scored

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-49973?
CVE-2026-49973 is a critical-severity vulnerability; its CVE record was published on June 11, 2026. Hermes WebUI before version 0.51.358 contains an improper access control vulnerability that allows unauthenticated remote attackers to hijack initial setup by submitting the _set_password parameter to the settings API endpoint without any network origin restriction. Attackers on any reachable…
When was CVE-2026-49973 made public?
CVE-2026-49973 was made public on June 10, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on June 11, 2026. EchelonGraph's copy of the record carries a last-modified date of November 8, 2026; the record at its source may have been updated since.
Is CVE-2026-49973 actively exploited?
CVE-2026-49973 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (46th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-49973?
CVE-2026-49973 has a CVSS base score of 9.4 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-49973?
A fix for CVE-2026-49973 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-49973 are linked in the Vendor Advisories panel on this page.

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