Vulnerability · Published Sep 15, 2026 · Assigned by zdi

CVE-2026-19780Koha Eval Code Injection Remote Code Execution Vulnerability

High 8.8

In plain English

A high-severity security flaw in Koha from Koha. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 64% of all known vulnerabilities).

Severity (CVSS 3.0)8.8High

Exploit odds (30 days)1.0%top 36.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Koha	Koha	25.12.00

Weakness: CWE-95 · Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

ZDI-26-616 x_research-advisory