HOMEVULNERABILITIESCVE-2026-53870
MEDIUM

CVE-2026-53870

CWE-276Published: June 17, 2026· Updated: Jun 17, 2026

5.5
CVSS v3.1

Official Description

Hermes Agent before 0.16.0 creates response_store.db and webhook_subscriptions.json with world-readable permissions (mode 0o644), exposing conversation history and HMAC secrets to local users. Attackers with local filesystem access can read these files directly to obtain sensitive data including conversation history, tool payloads, prompts, and per-route HMAC secrets.

NVD Source

Technical Analysis

CVE-2026-53870 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 5.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

All References (6)

→
https://github.com/NousResearch/hermes-agent/commit/3bace071bfadf2d2bec2ee048471a31ec920e3e8
→
https://github.com/NousResearch/hermes-agent/pull/30917
→
https://github.com/NousResearch/hermes-agent/pull/31469
→
https://github.com/NousResearch/hermes-agent/releases/tag/v2026.6.5
→
https://www.vulncheck.com/advisories/hermes-agent-sensitive-file-permission-vulnerability-in-store-files
→
https://github.com/NousResearch/hermes-agent/pull/30917

Quick Facts

CVE IDCVE-2026-53870
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-276
CISA KEVNo
PublishedJun 17, 2026

Related CVEs (CWE-276)

CVE-2026-21765
8.8
CVE-2026-6819
8.8
CVE-2026-49157
8.8
CVE-2026-12602
8.8
CVE-2026-23703
8.5
CVE-2026-0432
8.5

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-53870 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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