CVE-2026-82020 Hermes Agent 0.16.0 < 0.17.0 Credential Store Overwrite via File-Write Tool
Attackers can overwrite credential stores via file-write tools by bypassing path restrictions, leading to credential tampering or unauthorized access.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-82020?
CVE-2026-82020 is a high-severity path traversal vulnerability in NousResearch hermes-agent, published on 28 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
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.
Weakness: CWE-552
Which versions are affected by CVE-2026-82020?
How do I fix CVE-2026-82020?
No fix has been published for CVE-2026-82020 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-82020 being exploited?
There is no known exploitation of CVE-2026-82020 in the wild and no public exploit code.
Sources
Also known as GHSA-rrm3-x23q-98qc.