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CRITICAL

CVE-2026-90999

CVSS v3

9.8

CRITICAL

EPSS Score

0.7 %

exploit probability, as of 2026-09-28

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Description

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.

Technical details

Published
2026-09-16
Last Modified
2026-09-18

Frequently asked questions

What is CVE-2026-90999?

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.

Is CVE-2026-90999 actively exploited?

Active exploitation of CVE-2026-90999 has not been confirmed. Its EPSS score was 0.7% on 2026-09-28, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-90999?

CVE-2026-90999 has a CVSS v3 base score of 9.8 (CRITICAL severity).

Is CVE-2026-90999 affecting your environment?

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