CVE-2026-18657: An uncontrolled search path element in Kiro CLI before version 2.10.0 on Windows might allow a remote unauthen

Q: How do I fix CVE-2026-18657?

kiro cli: upgrade to 2.10.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-18657 being exploited?

CVE-2026-18657 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-18657 affect?

CVE-2026-18657 affects kiro cli. Severity is high (CVSS 7.8). An uncontrolled search path element in Kiro CLI before version 2.10.0 on Windows might allow a remote unauthenticated actor to execute arbitrary code via a maliciously crafted project directory containing an executable that bypasses workspa

Q: How urgent is CVE-2026-18657?

Priority 36/100. High severity; On your watchlist

Routine

HIGH 7.8WATCHLISTUPGRADE

CVE-2026-18657 is a high-severity flaw (CVSS 7.8) affecting kiro cli. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An uncontrolled search path element in Kiro CLI before version 2.10.0 on Windows might allow a remote unauthenticated actor to execute arbitrary code via a maliciously crafted project directory containing an executable that bypasses workspace trust protections when a local user starts Kiro CLI in the directory. To remediate this issue, users should upgrade to version 2.10.0 or higher.

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 87%)
CISA exploited list	No
Weakness	CWE-427
Published	2026-08-04
Last modified	2026-10-23

Publisher (CNA): AMZN · Vendor: amazon

Last updated 2026-10-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-04 20:16 UTCPublished CVE record published
2026-10-23 21:10 UTCUpdated Record last modified

amazon kiro cli UPGRADE

Affected: < 2.10.0

Fixed in: 2.10.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy kiro-cli || rpm -q kiro-cli || kiro-cli --version

2. UPGRADE to 2.10.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade kiro-cli

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade kiro-cli

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Fedora ELN · selinux-policy · FIXED · 45.23-1.eln159 · FEDORA-2026-3668c969a2 · source

sudo dnf upgrade --advisory=FEDORA-2026-3668c969a2

Fedora 46 · sugar-toolkit-gtk3 · FIXED · 0.122-2.fc46 · FEDORA-2026-d11eb2faf0 · source

sudo dnf upgrade --advisory=FEDORA-2026-d11eb2faf0

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-18657?

kiro cli: upgrade to 2.10.0. Exact commands for each OS are on this page.

Is CVE-2026-18657 being exploited?

CVE-2026-18657 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-18657 affect?

CVE-2026-18657 affects kiro cli. Severity is high (CVSS 7.8). An uncontrolled search path element in Kiro CLI before version 2.10.0 on Windows might allow a remote unauthenticated actor to execute arbitrary code via a maliciously crafted project directory containing an executable that bypasses workspa

How urgent is CVE-2026-18657?

Priority 36/100. High severity; On your watchlist

Software pages

Windows vulnerabilities

References

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