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MEDIUM · 5.4

CVE-2026-26378

Cross Site Scripting vulnerability in Koha 25.11 and before allows a remote attacker to execute arbitrary code via file upload function in Invoice features

Vulnerability Description

Cross Site Scripting vulnerability in Koha 25.11 and before allows a remote attacker to execute arbitrary code via file upload function in Invoice features

CVSS Score

5.4

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE

Affected Products

VendorProductVersions
KohaKoha<= 25.11.00

Related Weaknesses (CWE)

CWE-79

References

FAQ

What is CVE-2026-26378?

CVE-2026-26378 is a vulnerability with a CVSS score of 5.4 (MEDIUM). Cross Site Scripting vulnerability in Koha 25.11 and before allows a remote attacker to execute arbitrary code via file upload function in Invoice features

How severe is CVE-2026-26378?

CVE-2026-26378 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-26378?

Check the references section above for vendor advisories and patch information. Affected products include: Koha Koha.