How severe is CVE-2026-26379?

CVE-2026-26379 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-26379 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-26379?

CVE-2026-26379 affects Koha. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-26379?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-26379 have an EU (EUVD) identifier?

Yes. CVE-2026-26379 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34170.

When was CVE-2026-26379 published?

CVE-2026-26379 was published on 2026-06-03 and last updated on 2026-06-17.

CVE-2026-26379

CVE-2026-26379 is a medium-severity vulnerability in Koha with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-34170
Weakness: CWE-918
Affected product: Koha
Published: 2026-06-03
Last modified: 2026-06-17

Description

Koha versions up to 25.11 contain a Server-Side Request Forgery (SSRF) vulnerability via the Z39.50/SRU server configuration. This allows authenticated attackers to perform internal network scanning and identify running services by analyzing server response times.

Frequently asked questions

What is CVE-2026-26379?: Koha versions up to 25.11 contain a Server-Side Request Forgery (SSRF) vulnerability via the Z39.50/SRU server configuration. This allows authenticated attackers to perform internal network scanning and identify running services by analyzing server response times.
How severe is CVE-2026-26379?: CVE-2026-26379 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-26379 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-26379?: CVE-2026-26379 affects Koha. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-26379?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-26379 have an EU (EUVD) identifier?: Yes. CVE-2026-26379 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34170.
When was CVE-2026-26379 published?: CVE-2026-26379 was published on 2026-06-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:koha:koha:*:*:*:*:*:*:*:*

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