CVE-2026-10548Public exploit

Credential pool collapse via global token synchronization

Published Jun 2, 2026 · Updated Jun 2, 2026

Improper authentication in Nous Research Hermes Agent 2026.4.0 through 2026.4.23 allows local users to overwrite pooled Anthropic identities. During exhaustion handling, _sync_anthropic_entry_from_credentials_file blindly copies tokens from the global Claude credentials file into each differing claude_code pool entry. Exploitation requires local file access, multiple claude_code entries, and an exhaustion-driven rotation; affected entries converge on the injected identity, breaking account isolation and failover.

CVSS severity5.3
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Nous Research Hermes Agent 2026.4.0 through 2026.4.23 allows local users to overwrite pooled Anthropic identities. During exhaustion handling, _sync_anthropic_entry_from_credentials_file blindly copies tokens from the global Claude credentials file into each differing claude_code pool entry. Exploitation requires local file access, multiple claude_code entries, and an exhaustion-driven rotation; affected entries converge on the injected identity, breaking account isolation and failover.

The record

CVE
CVE-2026-10548
Published
Jun 2, 2026
Updated
Jun 2, 2026
Vendor
Nous Research
Product
Hermes Agent
Classifications
CWE-287, T1556
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2026.4.0
  2. Affected versionversion=2026.4.1
  3. Affected versionversion=2026.4.10
  4. Affected versionversion=2026.4.11
  5. Affected versionversion=2026.4.12
  6. Affected versionversion=2026.4.13
  7. Affected versionversion=2026.4.14
  8. Affected versionversion=2026.4.15
  9. Affected versionversion=2026.4.16
  10. Affected versionversion=2026.4.17
  11. Affected versionversion=2026.4.18
  12. Affected versionversion=2026.4.19
  13. Affected versionversion=2026.4.2
  14. Affected versionversion=2026.4.20
  15. Affected versionversion=2026.4.21
  16. Affected versionversion=2026.4.22
  17. Affected versionversion=2026.4.23
  18. Affected versionversion=2026.4.3
  19. Affected versionversion=2026.4.4
  20. Affected versionversion=2026.4.5
  21. Affected versionversion=2026.4.6
  22. Affected versionversion=2026.4.7
  23. Affected versionversion=2026.4.8
  24. Affected versionversion=2026.4.9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Nous Research · Hermes Agentversion=2026.4.0; version=2026.4.1; version=2026.4.10; version=2026.4.11; version=2026.4.12; version=2026.4.13; version=2026.4.14; version=2026.4.15; version=2026.4.16; version=2026.4.17; version=2026.4.18; version=2026.4.19; version=2026.4.2; version=2026.4.20; version=2026.4.21; version=2026.4.22; version=2026.4.23; version=2026.4.3; version=2026.4.4; version=2026.4.5; version=2026.4.6; version=2026.4.7; version=2026.4.8; version=2026.4.9

Published CVSS scores

5.3VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
4.3VulDBAV:L/AC:L/Au:S/C:P/I:P/A:P
1.9VulDBCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1556Modify Authentication Process

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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