CVE-2026-18773

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreMEDIUM confidence

Score 6.3 from GitHub Security Advisory (severity: LOW) published 2026-08-04. A secondary CVSS source baseline 6.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.3Exploit: Elevated riskExposed services: Not assessed

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

A vulnerability was detected in NousResearch hermes-agent up to 2026.6.5. Affected by this issue is the function _check_slash_access of the file gateway/run.py of the component Quick Command Handler. The manipulation results in incorrect authorization. The attack can be launched remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS v3
6.3
EG Score
6.3MEDIUMmedium confidence
EG Risk
44
EG Risk 44/100CISA SSVC

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
Severity63% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
26th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 4, 2026

Last Modified

August 12, 2026

Advisory Details (1)

Auto-updated Aug 4, 2026
No patch confirmed yet.
generic

hermes-agent: Hermes gateway quick commands bypass admin-only slash command restrictions · GitHub

https://gist.github.com/YLChen-007/f0036aa1c410b70f5e41272947180645

Vendor Advisories for CVE-2026-18773(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 61× 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 150 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-18773?
CVE-2026-18773 is a medium vulnerability published on August 4, 2026. A vulnerability was detected in NousResearch hermes-agent up to 2026.6.5. Affected by this issue is the function checkslash_access of the file gateway/run.py of the component Quick Command Handler. The manipulation results in incorrect authorization. The attack can be launched remotely. The exploit…
When was CVE-2026-18773 disclosed?
CVE-2026-18773 was first published on August 4, 2026, with the most recent update on August 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18773 actively exploited?
CVE-2026-18773 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (26th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-18773?
CVE-2026-18773 has a CVSS base score of 6.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-18773?
No fix for CVE-2026-18773 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-18773 are linked in the Vendor Advisories panel on this page.

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