How severe is CVE-2026-26281?

CVE-2026-26281 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-26281 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-26281?

CVE-2026-26281 affects Invoiceplane. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-26281?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-26281 have an EU (EUVD) identifier?

Yes. CVE-2026-26281 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8100.

When was CVE-2026-26281 published?

CVE-2026-26281 was published on 2026-02-18 and last updated on 2026-06-17.

CVE-2026-26281

CVE-2026-26281 is a medium-severity vulnerability in Invoiceplane with a CVSS 3.x base score of 4.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.4)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8100
Weakness: CWE-79
Affected product: Invoiceplane
Published: 2026-02-18
Last modified: 2026-06-17

Description

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 patches the issue.

Frequently asked questions

What is CVE-2026-26281?: 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 patches the issue.
How severe is CVE-2026-26281?: CVE-2026-26281 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-26281 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-26281?: CVE-2026-26281 affects Invoiceplane. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-26281?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-26281 have an EU (EUVD) identifier?: Yes. CVE-2026-26281 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8100.
When was CVE-2026-26281 published?: CVE-2026-26281 was published on 2026-02-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:invoiceplane:invoiceplane:1.7.0:-:*:*:*:*:*:*

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