PatchTheCVECVE-2026-23491: InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments
CVE-2026-23491 is a high-severity flaw (CVSS 7.5) 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 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 confi
Why this priority
- High severity
- EPSS top 8%: very likely to be exploited
- Public exploit reference
- CISA SSVC: automatable with total technical impact
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 4.6% (top 8%) |
| CISA exploited list | No |
| Weakness | CWE-22 |
| Published | 2026-02-18 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Exact fixes by distribution
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- GitHub PoC: lukasz-rybak/CVE-2026-23491 (0 stars)
- Write-up: github.com/InvoicePlane/InvoicePlane/security/advisories/GHSA-88gq-mv54-v3fc
- Nuclei scan template: InvoicePlane <= 1.6.3 - Arbitrary File Read
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-2026-23491?
invoiceplane: upgrade to 1.6.4. Exact commands for each OS are on this page.
Is CVE-2026-23491 being exploited?
CVE-2026-23491 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-2026-23491 affect?
CVE-2026-23491 affects invoiceplane. Severity is high (CVSS 7.5). 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
How urgent is CVE-2026-23491?
Priority 62/100. High severity; EPSS top 8%: very likely to be exploited; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action
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