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 29× in last 7d / 90× 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.

  1. 2026-07-28 09:06 UTCGHSA enrichment
  2. 2026-07-28 05:01 UTCGHSA enrichment
  3. 2026-07-28 00:56 UTCGHSA enrichment
  4. 2026-07-27 20:53 UTCGHSA enrichment
  5. 2026-07-27 16:47 UTCEG score recompute
  6. 2026-07-27 16:47 UTCGHSA enrichment
  7. 2026-07-27 14:14 UTCEPSS rescore
  8. 2026-07-27 12:45 UTCGHSA enrichment
  9. 2026-07-27 08:42 UTCGHSA enrichment
  10. 2026-07-27 04:39 UTCGHSA enrichment
  11. 2026-07-27 00:28 UTCGHSA enrichment
  12. 2026-07-26 20:22 UTCGHSA enrichment
  13. 2026-07-26 16:18 UTCEG score recompute
  14. 2026-07-26 16:18 UTCGHSA enrichment
  15. 2026-07-26 14:54 UTCEPSS rescore
  16. 2026-07-26 14:54 UTCEPSS rescore
  17. 2026-07-26 12:16 UTCEG score recompute
  18. 2026-07-26 12:15 UTCGHSA enrichment
  19. 2026-07-25 14:18 UTCEPSS rescore
  20. 2026-07-25 14:18 UTCEPSS rescore
  21. 2026-07-24 14:18 UTCEPSS rescore
  22. 2026-07-24 14:18 UTCEPSS rescore
  23. 2026-07-23 14:18 UTCEPSS rescore
  24. 2026-07-23 14:18 UTCEPSS rescore
  25. 2026-07-23 03:20 UTCEG score recompute
Show 65 more
  1. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-21 15:25 UTCEPSS rescore
  4. 2026-07-21 15:25 UTCEPSS rescore
  5. 2026-07-20 17:08 UTCEPSS rescore
  6. 2026-07-19 14:31 UTCEPSS rescore
  7. 2026-07-19 14:31 UTCEPSS rescore
  8. 2026-07-19 02:29 UTCEPSS rescore
  9. 2026-07-18 10:04 UTCEPSS rescore
  10. 2026-07-17 03:41 UTCGHSA enrichment
  11. 2026-07-16 23:39 UTCGHSA enrichment
  12. 2026-07-16 19:36 UTCGHSA enrichment
  13. 2026-07-16 17:03 UTCEPSS rescore
  14. 2026-07-16 15:33 UTCGHSA enrichment
  15. 2026-07-16 11:27 UTCGHSA enrichment
  16. 2026-07-16 07:25 UTCGHSA enrichment
  17. 2026-07-16 03:23 UTCGHSA enrichment
  18. 2026-07-15 23:21 UTCGHSA enrichment
  19. 2026-07-15 19:19 UTCGHSA enrichment
  20. 2026-07-15 16:57 UTCEPSS rescore
  21. 2026-07-15 16:57 UTCEPSS rescore
  22. 2026-07-15 15:16 UTCGHSA enrichment
  23. 2026-07-15 11:14 UTCGHSA enrichment
  24. 2026-07-15 07:12 UTCGHSA enrichment
  25. 2026-07-15 03:09 UTCGHSA enrichment
  26. 2026-07-15 02:00 UTCEPSS rescore
  27. 2026-07-15 02:00 UTCEPSS rescore
  28. 2026-07-14 23:04 UTCGHSA enrichment
  29. 2026-07-14 19:00 UTCGHSA enrichment
  30. 2026-07-14 14:56 UTCGHSA enrichment
  31. 2026-07-14 10:54 UTCGHSA enrichment
  32. 2026-07-14 06:52 UTCGHSA enrichment
  33. 2026-07-14 02:49 UTCGHSA enrichment
  34. 2026-07-13 22:47 UTCGHSA enrichment
  35. 2026-07-13 22:31 UTCEPSS rescore
  36. 2026-07-13 18:45 UTCGHSA enrichment
  37. 2026-07-13 14:43 UTCGHSA enrichment
  38. 2026-07-13 10:41 UTCGHSA enrichment
  39. 2026-07-13 06:38 UTCGHSA enrichment
  40. 2026-07-13 06:13 UTCEPSS rescore
  41. 2026-07-13 06:13 UTCEPSS rescore
  42. 2026-07-13 02:33 UTCGHSA enrichment
  43. 2026-07-12 22:30 UTCGHSA enrichment
  44. 2026-07-12 18:28 UTCGHSA enrichment
  45. 2026-07-12 14:26 UTCGHSA enrichment
  46. 2026-07-12 10:21 UTCGHSA enrichment
  47. 2026-07-12 06:18 UTCGHSA enrichment
  48. 2026-07-12 05:46 UTCEPSS rescore
  49. 2026-07-12 02:16 UTCGHSA enrichment
  50. 2026-07-11 22:14 UTCGHSA enrichment
  51. 2026-07-11 18:12 UTCGHSA enrichment
  52. 2026-07-11 14:09 UTCGHSA enrichment
  53. 2026-07-11 10:05 UTCGHSA enrichment
  54. 2026-07-11 08:27 UTCEPSS rescore
  55. 2026-07-11 08:27 UTCEPSS rescore
  56. 2026-07-11 06:01 UTCGHSA enrichment
  57. 2026-07-11 01:59 UTCGHSA enrichment
  58. 2026-07-10 21:57 UTCGHSA enrichment
  59. 2026-07-10 17:54 UTCGHSA enrichment
  60. 2026-07-10 13:51 UTCGHSA enrichment
  61. 2026-07-10 09:49 UTCGHSA enrichment
  62. 2026-07-10 05:46 UTCGHSA enrichment
  63. 2026-07-10 01:43 UTCGHSA enrichment
  64. 2026-07-09 21:41 UTCEG score recompute
  65. 2026-07-09 21:40 UTCMITRE cvelistV5first tracked

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 43.2% 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.

Dependency Blast Radius

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