---
title: "CVE-2026-88062: OmniRoute ACP Custom-Agent Remote Code Execution (RCE)"
url: https://erroneo.us/security/cve/CVE-2026-88062/
description: "CVE-2026-88062 (omniroute (npm)): OmniRoute is an open-source AI gateway providing a single endpoint for multiple model providers. In 3.8.49 and earlier…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-09-10
date_modified: 2026-09-11
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-88062"
kev: false
cvss: 9.5
epss: 0.01424
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-88062: OmniRoute ACP Custom-Agent Remote Code Execution (RCE)

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 1.4% , percentile 73: FIRST’s model estimates a 1.4% chance of exploitation activity in the next 30 days, higher than 73% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes omniroute (npm) <= 3.8.50, no fixed version listed . Check your lockfile, including transitive dependencies.

## What it is

OmniRoute is an open-source AI gateway providing a single endpoint for multiple model providers. In 3.8.49 and earlier, the OmniRoute POST /api/acp/agents custom ACP agent endpoint accepted attacker-controlled binary and versionCommand values and used only a self-consistency check before execFileSync executed the selected interpreter and arguments. The same request called refreshAgentCache, and resolveVersionProbe accepted the matched command before the execFileSync sink ran it. The tokenizeVersionCommand function and DISALLOWEDVERSIONCOMMANDCHARS filter rejected a limited set of shell metacharacters but still allowed interpreter evaluation arguments. The isAuthenticated function relied on isAuthRequired, which accepted anonymous requests when requireLogin was false, while api/acp/ was absent from LOCALONLYAPIPREFIXES and SPAWNCAPABLEPREFIXES. With requireLogin=false or during a fresh-instance bootstrap window, a remote anonymous request could supply an interpreter evaluation argument and execute arbitrary code in the server container. With requireLogin=true and a configured management password, exploitation instead required a management session or management-scoped API key. No fixed version is available as of this review.

## Affected packages

- npm `omniroute` <= 3.8.50 → fixed: none listed

## Affected products (CVE record)

- diegosouzapw OmniRoute: < 3.8.49

## Severity

- GitHub_M CVSS 4.0: 9.5 `CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`
- GitHub CVSS 4.0: 9.5 `CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 1.42% probability of exploitation activity in the next 30 days; percentile 73.

## Sources

- [GitHub Advisory GHSA-hf57-cqmx-p4gr](https://github.com/advisories/GHSA-hf57-cqmx-p4gr)
- [CVE.org record CVE-2026-88062](https://www.cve.org/CVERecord?id=CVE-2026-88062)
- [NVD entry CVE-2026-88062](https://nvd.nist.gov/vuln/detail/CVE-2026-88062)
- [github.com](https://github.com/diegosouzapw/OmniRoute/security/advisories/GHSA-hf57-cqmx-p4gr)
- [github.com](https://github.com/diegosouzapw/OmniRoute/pull/11028)
- [github.com](https://github.com/diegosouzapw/OmniRoute/commit/60829241fd64d0317aa6a0dd8cd7a445a5287fed)

---
Source page: https://erroneo.us/security/cve/CVE-2026-88062/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt