CVE-2026-23491
CriticalPublic exploitInvoicePlane has Unauthenticated Path Traversal in Guest Controller
Published Feb 18, 2026 · Updated Aug 12, 2026 · Also known as GHSA-88gq-mv54-v3fc
Key Facts
Patch immediately- CVE-2026-23491 is a critical-severity vulnerability (CVSS 9.3 v4) affecting InvoicePlane.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 4.6% probability of exploitation in the next 30 days.
- Fixed versions are available, including InvoicePlane 1.6.4.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
CVSS v4
9.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS (30-day exploit likelihood)
4.6%
Higher than 91.4% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2026-23491 brief as a PDF
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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.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| InvoicePlaneInvoiceplane | >= < 1.6.4 | 1.6.4 |
Patched Releases
InvoicePlane
1.6.4
Timeline
Publicly disclosed
Feb 18, 2026
Last updated
Aug 12, 2026
Weakness Type
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
References
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23491.json
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2026-23491
- otherhttps://github.com/InvoicePlane/InvoicePlane/commit/add8bb798dde621f886823065ef1841986543c69
- otherhttps://github.com/InvoicePlane/InvoicePlane/security/advisories/GHSA-88gq-mv54-v3fc
FAQ
Common Questions.
InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments.
Affected: InvoicePlane versions >= < 1.6.4. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including InvoicePlane 1.6.4.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
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