What is CVE-2026-38819?

CVE-2026-38819 is a medium-severity vulnerability in Opennds, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 5.3/10. Published 2026-08-28.

How severe is CVE-2026-38819?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Opennds

CVE-2026-38819

Multiple memory leaks in openNDS before 11.0.0 allow an unauthenticated attacker on the captive portal network to exhaust all available memory on the device within minutes.

Published 2026-08-28 · last modified 2026-09-09.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (15.9th percentile), scored 2026-10-12.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

Opennds

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

Frequently asked questions

What is CVE-2026-38819?: CVE-2026-38819 is a medium-severity vulnerability in Opennds, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 5.3/10. Published 2026-08-28.
How severe is CVE-2026-38819?: Medium severity. CVSS v3 base score is 5.3 out of 10.