What is CVE-2026-19780?

CVE-2026-19780 is a high-severity vulnerability in Koha, classified under Eval Injection. CVSS score: 8.8/10. Published 2026-09-15.

How severe is CVE-2026-19780?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in Koha

CVE-2026-19780

Koha Eval Code Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Koha. Authentication is required to exploit this vulnerability. The specific flaw exists within the web service, which listens on TCP port 8081 by default. The issue results from the lack of proper validation of a user-supplied string before passing it to the eval function. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-29165.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Koha — versions 25.12.00

Weakness classification (CWE)

CWE-95 — Eval Injection

References

zdi-disclosures@trendmicro.com (x_research-advisory)

Frequently asked questions

What is CVE-2026-19780?: CVE-2026-19780 is a high-severity vulnerability in Koha, classified under Eval Injection. CVSS score: 8.8/10. Published 2026-09-15.
How severe is CVE-2026-19780?: High severity. CVSS v3 base score is 8.8 out of 10.