CVEvulnerability

CVE-2026-82021

9.0 CRITICAL Published 2026-08-28 Modified 2026-09-08 Official page ↗
Status
Deferred
Published
2026-08-28
Last modified
2026-09-08
Assigner
[email protected]
CVSS 4.0 ([email protected])
9.0 CRITICAL — 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1 ([email protected])
8.3 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Weaknesses
CWE-494

Description

Hermes Agent 0.18.2 prior to 0.19.0 contains a supply chain vulnerability in its bundled MCP catalog that allows a remote attacker to execute arbitrary code by compromising a third-party upstream repository referenced via a mutable branch rather than a pinned commit SHA. An attacker who compromises the upstream repository can propagate malicious code to every host that installs the affected catalog entry, with no further action required by the operator.

Related

Weakness · CWE (1)

  • CWE-494 Download of Code Without Integrity Check weakness

References