CVE-2026-82021

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

Not scored by EPSS

EPSS percentile

Not scored by EPSS

NVD base score

The NVD has published no score for this record

NVD CVSS vector

No NVD score to derive

NVD analysis status

Not recorded

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-08-28 18:50Z11 HR AGO

Last updated

2026-08-28 19:59Z10 HR AGO

Reserved

2026-08-27

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

Critical (CVSS 9.0)

CNA CVSS vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Weaknesses

• CWE-494Download of Code Without Integrity CheckBase

Data version

5.2

Document digest

d556a04e5a860fd443decc9ae8af51128e719802c08714cce369fb24e7bdcc99

• github.comRelease Noteshttps://github.com/NousResearch/hermes-agent/releases/tag/v2026.7.20release-notes
• github.comPull Requesthttps://github.com/NousResearch/hermes-agent/pull/64463issue-tracking
• github.comPatch Commithttps://github.com/NousResearch/hermes-agent/commit/9df5f879b4a5925c0f8f947e7e16ed8e845932c3patch
• www.vulncheck.comhttps://www.vulncheck.com/advisories/hermes-agent-mcp-catalog-supply-chain-rce-via-mutable-branch-referencethird-party-advisory