What is the CVSS score of CVE-2026-26270?

CVE-2026-26270 has a CVSS 3.1 base score of 5.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Invoiceplane are affected by CVE-2026-26270?

Organizations using InvoicePlane should be aware of moderate risk from CVE-2026-26270, a cross-site scripting vulnerability rated CVSS 5.4.. A patch is available.

How to fix or mitigate CVE-2026-26270?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Invoiceplane CVE-2026-26270

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-02-18 security-advisories@github.com

XSS Invoiceplane

5.4

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

5.4 MEDIUM

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

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

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

Patch released

Feb 20, 2026 - 17:13 nvd

Patch available

CVE Published

Feb 18, 2026 - 23:16 nvd

MEDIUM 5.4

DescriptionGitHub Advisory

InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments. A Stored Cross-Site Scripting (XSS) vulnerability exists in InvoicePlane (latest version) that allows an authenticated user with permissions to manage Invoice Groups to inject malicious JavaScript into the "Identifier Format" field. This script executes when any user views the invoice list or the main dashboard. Version 1.7.1 patches the issue.

AnalysisAI

InvoicePlane 1.7.0 and earlier contains a stored XSS vulnerability in the Invoice Groups "Identifier Format" field that authenticated users can exploit to inject malicious scripts executed when other users access the invoice list or dashboard. An attacker with invoice group management permissions can inject arbitrary JavaScript that runs in the context of other users' browsers, potentially leading to session hijacking or credential theft. …

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Vulnerability AssessmentAI

Risk Assessment	CVSS 5.4 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker (requires authentication) could exploit this vulnerability to compromise the affected system.
Remediation	A vendor patch is available — apply it immediately. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. …

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CVE-2026-26270 vulnerability details – vuln.today

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