CVE-2026-49973

CRITICALPre-NVD 9.49.4—
EchelonGraph scoreMEDIUM confidence

Score 9.4 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-11. a secondary CVSS source baseline 9.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
9.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.4Exploit: Elevated riskExposed: 0

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

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
9.4(medium)
EG Risk
73(Attend)
EG Risk 73/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity94% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
44%
KEV
Not listed

Published

June 11, 2026

Last Modified

July 14, 2026

Advisory Details (5)

Auto-updated Sep 14, 2026
Patch available. Sources: github_commit, github_pr, github_release.
github_pr

[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
generic

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_pr Patch Available

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

Patch available: nesquena/hermes-webui exp-v0.52.274 (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-v0.52.274 (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 7× in last 7d / 52× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 440 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-49973?
CVE-2026-49973 is a critical vulnerability 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 setpassword parameter to the settings API endpoint without any network origin restriction. Attackers on any reachable network…
When was CVE-2026-49973 disclosed?
CVE-2026-49973 was first published in the National Vulnerability Database on June 11, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49973 actively exploited?
CVE-2026-49973 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 55.9% of all scored CVEs.
What is the CVSS score of CVE-2026-49973?
CVE-2026-49973 has a CVSS v3 base score of 9.4 (NVD).
How do I remediate CVE-2026-49973?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49973, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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