CVE-2026-9353

HIGHNVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

Score 7.3 from GitHub Security Advisory published 2026-05-26. NVD baseline CVSS 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
7.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.3Exploit: NoneExposed: 0

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

A security vulnerability has been detected in NousResearch hermes-agent up to 2026.4.23. Impacted is an unknown function of the file agent/skills_guard.py of the component Skills Guard Multi-Word Prompt Handler. The manipulation of the argument THREAT_PATTERNS leads to injection. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS v3
7.3
EG Score
7.3(medium)
EPSS
22.4%
KEV
Not listed

Published

May 24, 2026

Last Modified

May 26, 2026

Advisory Details (1)

Auto-updated Jun 11, 2026
No patch confirmed yet.
generic

Skills Guard Multi-Word Prompt Injection Bypass · GitHub

https://gist.github.com/YLChen-007/82a3539d6358842e69dfaef0a9fcf14a

Vendor Advisories for CVE-2026-9353(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 7× in last 7d / 54× 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 137 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-9353?
CVE-2026-9353 is a high vulnerability published on May 24, 2026. A security vulnerability has been detected in NousResearch hermes-agent up to 2026.4.23. Impacted is an unknown function of the file agent/skillsguard.py of the component Skills Guard Multi-Word Prompt Handler. The manipulation of the argument THREATPATTERNS leads to injection. Remote exploitation…
When was CVE-2026-9353 disclosed?
CVE-2026-9353 was first published in the National Vulnerability Database on May 24, 2026, with the most recent update on May 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9353 actively exploited?
CVE-2026-9353 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 22.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-9353?
CVE-2026-9353 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-9353?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9353, 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

Explore the affected products and dependency analysis for CVE-2026-9353

Explore →

Is Your Infrastructure Affected by CVE-2026-9353?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs