CVE-2026-26377

Name: CVE-2026-26377
Creator: NVD / NIST
Published: 2026-03-05T16:16:16.35+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.37%

Last modified Jun 17, 2026

CVE-2026-26377 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Cross Site Scripting vulnerability in Koha 25.11 and before allows a remote attacker to execute arbitrary code via the News function.. EPSS estimates a 0.37% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.37%

29.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Koha	Koha	<= 25.11.00

References

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

Timeline

Published: Mar 5, 2026
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2026-26377?

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 a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.37% probability of exploitation in the next 30 days.

How do I fix CVE-2026-26377?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-26377?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST