CVE-2026-58123

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-10. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

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

Hermes WebUI before 0.51.788 contains an unauthenticated remote code execution vulnerability that allows remote attackers to execute arbitrary shell commands by accessing the embedded terminal API endpoints without credentials. Attackers can create a session, attach a PTY shell, and write arbitrary commands through the terminal input endpoint to achieve full command execution as the server process user via four sequential unauthenticated HTTP requests.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: Track

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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
57%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 14, 2026

Advisory Details (4)

Auto-updated Jul 25, 2026
Patch available. Sources: github_pr, github_release, github_commit.
generic

Hermes WebUI < 0.51.788 Unauthenticated RCE via Terminal API | Advisories | VulnCheck

https://www.vulncheck.com/advisories/hermes-webui-unauthenticated-rce-via-terminal-api
github_release Patch Available

v0.51.788

Patch available: nesquena/hermes-webui v0.51.788

https://github.com/nesquena/hermes-webui/releases/tag/v0.51.788
github_pr

fix(security): gate embedded-terminal endpoints to local origins when auth disabled

Upstream fix in progress (PR #5268 · nesquena/hermes-webui, state=closed)

https://github.com/nesquena/hermes-webui/pull/5268
github_commit Patch Available

commit d257e5f36cfa (nesquena/hermes-webui)

Patch available: nesquena/hermes-webui exp-v0.52.120 (contains commit d257e5f36cfa)

https://github.com/nesquena/hermes-webui/commit/d257e5f36cfa9328600c8bde6f0de09a6ad9b6f4

Vendor Advisories for CVE-2026-58123(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 36× in last 7d / 101× 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 101 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-58123?
CVE-2026-58123 is a critical vulnerability published on July 9, 2026. Hermes WebUI before 0.51.788 contains an unauthenticated remote code execution vulnerability that allows remote attackers to execute arbitrary shell commands by accessing the embedded terminal API endpoints without credentials. Attackers can create a session, attach a PTY shell, and write arbitrary…
When was CVE-2026-58123 disclosed?
CVE-2026-58123 was first published in the National Vulnerability Database on July 9, 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-2026-58123 actively exploited?
CVE-2026-58123 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 43.1% of all scored CVEs.
What is the CVSS score of CVE-2026-58123?
CVE-2026-58123 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-58123?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58123, 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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