How severe is CVE-2026-23491?

CVE-2026-23491 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-23491 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-23491?

CVE-2026-23491 affects Invoiceplane. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-23491?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-23491 have an EU (EUVD) identifier?

Yes. CVE-2026-23491 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7928.

When was CVE-2026-23491 published?

CVE-2026-23491 was published on 2026-02-18 and last updated on 2026-06-17.

CVE-2026-23491

CVE-2026-23491 is a high-severity vulnerability in Invoiceplane with a CVSS 3.x base score of 7.5. 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-22.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 9.3
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7928
Weakness: CWE-22
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 path traversal vulnerability exists in the `get_file` method of the `Guest` module's `Get` controller in InvoicePlane up to and including through 1.6.3. The vulnerability allows unauthenticated attackers to read arbitrary files on the server by manipulating the input filename. This leads to the disclosure of sensitive information, including configuration files with database credentials. Version 1.6.4 fixes the issue.

Frequently asked questions

What is CVE-2026-23491?: InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments. A path traversal vulnerability exists in the `get_file` method of the `Guest` module's `Get` controller in InvoicePlane up to and including through 1.6.3. The vulnerability allows unauthenticated attackers to read arbitrary files on the server by manipulating the input filename. This leads to the disclosure of sensitive information, including configuration files with database credentials. Version 1.6.4 fixes the issue.
How severe is CVE-2026-23491?: CVE-2026-23491 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-23491 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-23491?: CVE-2026-23491 affects Invoiceplane. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-23491?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-23491 have an EU (EUVD) identifier?: Yes. CVE-2026-23491 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7928.
When was CVE-2026-23491 published?: CVE-2026-23491 was published on 2026-02-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:invoiceplane:invoiceplane:*:*:*:*:*:*:*:*

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