CVE-2026-26281: InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments

Routine

MEDIUM 4.4DOWNGRADE

CVE-2026-26281 is a medium-severity flaw (CVSS 4.4) affecting invoiceplane. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments. A stored cross-site scripting (XSS) vulnerability in the Sumex invoice view allows an authenticated user with client and invoice management privileges to execute arbitrary JavaScript in the browser of any user viewing the invoice. This can lead to session hijacking, data theft, or other malicious actions on behalf of the victim user. Version 1.7.1

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.4 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 88%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-02-18
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: invoiceplane

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-18 23:16 UTCPublished CVE record published
2026-06-17 10:26 UTCUpdated Record last modified

invoiceplane invoiceplane DOWNGRADE

Affected: 1.7.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.7.0

1. Check installed version

apt-cache policy invoiceplane || rpm -q invoiceplane || invoiceplane --version

2. No fixed release: DOWNGRADE to a release before 1.7.0 (Debian / Ubuntu)

apt-cache madison invoiceplane sudo apt install invoiceplane=<VERSION_BEFORE_1.7.0> sudo apt-mark hold invoiceplane

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list invoiceplane sudo dnf downgrade invoiceplane-<VERSION_BEFORE_1.7.0> sudo dnf versionlock add invoiceplane

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-26281?

invoiceplane: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-26281 being exploited?

CVE-2026-26281 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-2026-26281 affect?

CVE-2026-26281 affects invoiceplane. Severity is medium (CVSS 4.4). InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments. A stored cross-site scripting (XSS) vulnerability in the Sumex invoice view allows an authenticated user with client and invoice management

How urgent is CVE-2026-26281?

Priority 23/100. Public exploit reference

Related CVEs

CVE-2025-64012 MEDIUM 4.3 DOWNGRADE InvoicePlane commit debb446c is vulnerable to Incorrect Access Control
CVE-2026-26270 MEDIUM 5.4 DOWNGRADE InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments
CVE-2026-25596 MEDIUM 4.8 UPGRADE InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments
CVE-2026-25595 MEDIUM 4.8 UPGRADE InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments
CVE-2026-25594 MEDIUM 4.8 UPGRADE InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments

References

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