Vulnerability · Published Aug 28, 2026 · Assigned by VulnCheck

CVE-2026-82020Hermes Agent 0.16.0 < 0.17.0 Credential Store Overwrite via File-Write Tool

Medium 6.8

In plain English

A medium-severity security flaw in hermes-agent from NousResearch. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).

Severity (CVSS 3.1)6.8Medium

Exploit odds (30 days)0.4%top 62.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Hermes Agent 0.16.0 prior to 0.17.0 contains an improper path restriction vulnerability that allows attackers who can influence ingested message content to overwrite the credential store by bypassing sensitive-path guards that excluded the auth.json file. Attackers can craft malicious messages directing the agent's file-write tooling to overwrite the credential store without triggering any path-based protection, enabling credential tampering or unauthorized access.

Affected products (as reported)

Vendor	Product	Versions
NousResearch	hermes-agent	0.16.0 – before 0.17.02026.6.5 – before 2026.6.19

Weakness: CWE-552 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

References

Hermes Agent v2026.6.19 Release Notes release-notes
Pull Request issue-tracking, patch
Patch Commit (1) patch
Patch Commit (2) patch
https://www.vulncheck.com/advisories/hermes-agent-credential-store-overwrite-via-file-write-tool third-party-advisory