CVE-2026-49973

CRITICALPre-NVD 9.49.4—
EchelonGraph scoreHIGH 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 week
9.4
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.4Exploit: NoneExposed: 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(high)
EPSS
41.7%
KEV
Not listed

Published

June 11, 2026

Last Modified

June 13, 2026

Advisory Details (5)

Auto-updated Jun 13, 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 v0.51.358 (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 v0.51.358 (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 72× in last 7d / 317× 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 317 total refreshes for this CVE.

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

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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 June 13, 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 41.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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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