CVE-2026-50765: A stored cross-site scripting (XSS) vulnerability in the patron restriction type administration page of Koha L

Q: How do I fix CVE-2026-50765?

koha: upgrade to newer than 25.11.00. Exact commands for each OS are on this page.

Q: Is CVE-2026-50765 being exploited?

CVE-2026-50765 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-50765 affect?

CVE-2026-50765 affects koha. Severity is medium (CVSS 6.1). A stored cross-site scripting (XSS) vulnerability in the patron restriction type administration page of Koha Library Management System 0 through 25.11 versions allow an authenticated remote attacker with administrator privileges to inject a

Q: How urgent is CVE-2026-50765?

Priority 32/100. Public exploit reference

Routine

MEDIUM 6.1UPGRADE

CVE-2026-50765 is a medium-severity flaw (CVSS 6.1) affecting koha. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A stored cross-site scripting (XSS) vulnerability in the patron restriction type administration page of Koha Library Management System 0 through 25.11 versions allow an authenticated remote attacker with administrator privileges to inject arbitrary web scripts via the restriction type label (display_text field).

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-06-26
Last modified	2026-07-05

Publisher (CNA): MITRE · Vendor: koha

Last updated 2026-07-05 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-26 22:16 UTCPublished CVE record published
2026-07-05 02:17 UTCUpdated Record last modified

koha koha UPGRADE

Affected: <= 25.11.00

Fixed in: newer than 25.11.00

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy koha || rpm -q koha || koha --version

2. UPGRADE to newer than 25.11.00 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade koha

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade koha

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-50765?

koha: upgrade to newer than 25.11.00. Exact commands for each OS are on this page.

Is CVE-2026-50765 being exploited?

CVE-2026-50765 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-50765 affect?

CVE-2026-50765 affects koha. Severity is medium (CVSS 6.1). A stored cross-site scripting (XSS) vulnerability in the patron restriction type administration page of Koha Library Management System 0 through 25.11 versions allow an authenticated remote attacker with administrator privileges to inject a

How urgent is CVE-2026-50765?

Priority 32/100. Public exploit reference

Related CVEs

CVE-2026-50767 MEDIUM 5.4 UPGRADE A stored cross-site scripting (XSS) vulnerability in the item type administration page of Koha Library Managem
CVE-2026-50766 MEDIUM 5.4 UPGRADE A stored cross-site scripting (XSS) vulnerability in the OPAC item detail page of Koha Library Management Syst

References

← Back to latest CVEs