CVE-2026-126758Moonshot AI Kimi Code untrusted input in a security decision
CVE-2026-126758 is a untrusted input in a security decision in Moonshot AI Kimi Code, rated low (1.9 on CVSS 4.0).
Why this priority: Low severity, with no exploitation signal.
Published · Updated · NVD status: Deferred
What it is
A security check relies on a value the attacker can set. The software trusts input it should check, so crafted values reach code that assumes they are well formed.
How it is reached
An attacker can exploit it by someone who can already run code or sign in on the machine, with an ordinary user account, and nobody has to click anything.
What an attacker gains
The direct impact is limited: partial access to data or a partial outage. In practice, this kind of flaw lets an attacker reach data or actions their role should not allow.
Is it being exploited?
There is no public report of exploitation yet.
What to do
- Upgrade Moonshot AI Kimi Code to 2.1.0 or later.
- Limit who can run code or sign in on the hosts that run it.
Description from NVD
A vulnerability was detected in Moonshot AI Kimi Code up to 2.0.2. This vulnerability affects unknown code of the file .kimi-code/local.toml of the component WorkspaceDirsService. Performing a manipulation of the argument additional_dir results in reliance on untrusted inputs in a security decision. The attack requires a local approach. The exploit is now public and may be used. Upgrading to version 2.1.0 is able to resolve this issue. Upgrading the affected component is recommended.
What this means for your architecture.
A CVE names a product. Whether it matters depends on where that product sits in your systems: what reaches it, which trust boundary it guards and what it can reach once compromised. Veriom maps your components, their relationships and your trust boundaries from your code, cloud and delivery evidence, so you can see where a component like this sits. The radar itself does not look at your systems.
Components it touches
- Permission checks in APIs and admin surfaces. The flaw sits between one role or tenant and another.
- Multi-tenant services. The flaw sits between one role or tenant and another.
- Interfaces that accept external input. The flaw sits at the input boundary of the affected component.
Trust boundaries in play
- Host boundary. The attacker needs a foothold on the machine first; the flaw turns a small foothold into a bigger one.
- Between one role or tenant and another. An attacker who crosses it can reach data or actions their role should not allow.
- At the input boundary of the affected component. An attacker who crosses it can drive the component into behaviour its authors did not intend.
Questions to answer about your own systems
- Where does Moonshot AI Kimi Code run in your systems, and at which version?
- Which of those hosts also run code or users you do not fully trust?
- What can it reach once compromised: which data stores, secrets and services?
Sources
- CVE records and CVSS scores from the NVD CVE API. This product uses the NVD API but is not endorsed or certified by the NVD.
- Exploitation status from CISA’s Known Exploited Vulnerabilities catalog.
- Exploit likelihood from FIRST’s Exploit Prediction Scoring System (EPSS), refreshed daily.
- Explanations are written by Veriom from fixed templates over each record’s data, not by a person reviewing each CVE. Descriptions are quoted from the records as published.