Is CVE-2026-9255 actively exploited?

No active exploitation of CVE-2026-9255 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-9255 be exploited remotely?

No. CVE-2026-9255 requires local access to exploit.

What is the CVSS score of CVE-2026-9255?

CVE-2026-9255 has a CVSS score of 7.8 (HIGH).

HOME VULNERABILITIESCVE-2026-9255

HIGH

CVE-2026-9255

CWE-862Published: May 22, 2026· Updated: May 22, 2026

7.8

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:2.1th

Official Description

Missing input source validation in the tool authorization prompt in Kiro CLI before 1.28.0 allows a local attacker to execute arbitrary tools, including shell commands, without user approval by crafting content that is piped to kiro-cli via stdin.

We recommend you to upgrade to kiro-cli version 1.28.0 or later.

NVD Source

Technical Analysis

CVE-2026-9255 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.