Kargo CVE-2026-42350

Q: What is the CVSS score of CVE-2026-42350?

CVE-2026-42350 has a CVSS 4.0 base score of 5.1 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

MEDIUM

URL Redirection to Untrusted Site (Open Redirect) (CWE-601)

2026-05-08 GitHub_M

Open Redirect

5.1

CVSS 4.0 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

5.1 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Scope

Lifecycle Timeline

Analysis Generated

May 09, 2026 - 01:32 vuln.today

CVSS changed

May 08, 2026 - 23:22 NVD

5.1 (MEDIUM)

CVE Published

May 08, 2026 - 22:35 nvd

UNKNOWN (no severity yet)

CVE Published

May 08, 2026 - 22:35 nvd

MEDIUM 5.1

DescriptionGitHub Advisory

Kargo manages and automates the promotion of software artifacts. Prior to versions 1.7.10, 1.8.13, 1.9.8, and 1.10.2, Kargo is vulnerable to open redirect in UI OIDC login flow via the redirectTo query parameter. This issue has been patched in versions 1.7.10, 1.8.13, 1.9.8, and 1.10.2.

AnalysisAI

Open redirect vulnerability in Kargo UI OIDC login flow allows unauthenticated remote attackers to redirect users to arbitrary external websites via a malicious redirectTo query parameter. Versions prior to 1.7.10, 1.8.13, 1.9.8, and 1.10.2 are affected. This requires user interaction (clicking a crafted link) but can facilitate phishing attacks by making malicious redirects appear legitimate within the Kargo authentication flow.

Technical ContextAI

Kargo is a software artifact promotion and deployment automation platform that integrates OIDC (OpenID Connect) for federated authentication in its web UI. The vulnerability resides in the OIDC login redirect handler, which fails to validate or sanitize the redirectTo query parameter before using it in an HTTP redirect response. This is a classic CWE-601 (URL redirection to untrusted site) vulnerability where user-supplied input is used directly in a Location header or equivalent redirect mechanism without proper validation against a whitelist of safe redirect destinations. The attack surface is the login/authentication endpoint of the Kargo UI, exposed over the network to any user with access to the application's web interface.

RemediationAI

Upgrade Kargo to version 1.7.10, 1.8.13, 1.9.8, 1.10.2, or later depending on your current minor version branch. The patched versions validate the redirectTo parameter against a whitelist of safe redirect destinations (typically the Kargo UI's own domain) before issuing the redirect. No workarounds are documented for unpatched versions; however, network-level controls such as a Web Application Firewall (WAF) can be configured to block requests containing suspicious redirectTo parameter values pointing to external domains. This introduces operational overhead and may introduce false positives if legitimate cross-origin scenarios exist. The recommended approach is to upgrade promptly, especially if Kargo is exposed to users who may receive phishing emails or click external links.

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CVE-2026-42350 vulnerability details – vuln.today

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