How severe is CVE-2026-2728?

CVE-2026-2728 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-2728 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-2728?

CVE-2026-2728 affects Librenms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-2728?

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

Does CVE-2026-2728 have an EU (EUVD) identifier?

Yes. CVE-2026-2728 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21907.

When was CVE-2026-2728 published?

CVE-2026-2728 was published on 2026-04-13 and last updated on 2026-06-17.

CVE-2026-2728

CVE-2026-2728 is a medium-severity vulnerability in Librenms with a CVSS 3.x base score of 4.8. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
CVSS v4: 4.6
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-21907
Weakness: CWE-79
Affected product: Librenms
Published: 2026-04-13
Last modified: 2026-06-17

Description

LibreNMS versions before 26.3.0 are affected by an authenticated Cross-site Scripting vulnerability on the showconfig page. Successful exploitation requires administrative privileges. Exploitation could result in XSS attacks being performed against other users with access to the page.

Frequently asked questions

What is CVE-2026-2728?: LibreNMS versions before 26.3.0 are affected by an authenticated Cross-site Scripting vulnerability on the showconfig page. Successful exploitation requires administrative privileges. Exploitation could result in XSS attacks being performed against other users with access to the page.
How severe is CVE-2026-2728?: CVE-2026-2728 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-2728 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-2728?: CVE-2026-2728 affects Librenms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-2728?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-2728 have an EU (EUVD) identifier?: Yes. CVE-2026-2728 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21907.
When was CVE-2026-2728 published?: CVE-2026-2728 was published on 2026-04-13 and last updated on 2026-06-17.

References

https://projectblack.io/blog/librenms-authenticated-rce-and-xss/#xss-on-showconfig-page-2630

Affected products (1)

cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*

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