---
id: CVE-2026-90999
title: >-
  Sentry Seer is vulnerable to a multi-stage trust-boundary violation that
  allows unauthenticated attacker-controlled telemetry to become code that is
  executed by an agent in a privileged automation environment
summary: >-
  Sentry Seer is vulnerable to a multi-stage trust-boundary violation that
  allows unauthenticated attacker-controlled telemetry to become code that is
  executed by an agent in a privileged automation environment. An external
  attacker can su…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-20
  - CWE-74
  - CWE-94
  - CWE-116
  - CWE-913
vendor: 'Functional Software, Inc.'
product: Sentry Seer
affected:
  - sentry_seer Web site
published: '2026-09-16'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T17:49:08.457'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90999'
references:
  - url: 'https://kb.cert.org/vuls/id/212479'
    label: cret@cert.org
  - url: 'https://www.kb.cert.org/vuls/id/212479'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
epss: 0.0067
epssPercentile: 0.49891
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-09-18T13:40:06.015791Z'
ingestedAt: '2026-09-16T15:58:38.771Z'
---

## Overview

Sentry Seer is vulnerable to a multi-stage trust-boundary violation that allows unauthenticated attacker-controlled telemetry to become code that is executed by an agent in a privileged automation environment. An external attacker can submit fabricated Sentry events without having access to the victim’s Sentry account, source repository, or infrastructure.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.