CVE-2026-90999 Sentry Seer vulnerability allows attacker-controlled input to be executed in a privileged environment
Unauthenticated attackers can execute arbitrary code in Sentry Seer's privileged automation environment via fabricated telemetry events.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-90999?
CVE-2026-90999 is a critical code injection vulnerability in Functional Software, Inc. Sentry Seer, published on 16 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-90999?
How do I fix CVE-2026-90999?
No fix has been published for CVE-2026-90999 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-90999 being exploited?
There is no known exploitation of CVE-2026-90999 in the wild and no public exploit code.
Sources
Also known as GHSA-vh55-q5m4-8wr6.