CVE-2026-26377 — MEDIUM (5.4)

Q: What is CVE-2026-26377?

CVE-2026-26377 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 the News function.

Q: How severe is CVE-2026-26377?

CVE-2026-26377 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-26377?

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

Vulnerability Description

Cross Site Scripting vulnerability in Koha 25.11 and before allows a remote attacker to execute arbitrary code via the News function.

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

Vendor	Product	Versions
Koha	Koha	<= 25.11.00

Related Weaknesses (CWE)

CWE-79

References

https://g03m0n.github.io/Third Party Advisory
https://g03m0n.github.io/posts/cve-2026-26377/ExploitThird Party Advisory
https://github.com/Koha-Community/KohaProduct

FAQ

What is CVE-2026-26377?

CVE-2026-26377 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 the News function.

How severe is CVE-2026-26377?

CVE-2026-26377 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-2026-26377?

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