What is CVE-2026-83600?

CVE-2026-83600 is a medium-severity vulnerability in Netdata, classified under Off-by-one Error. CVSS score: 6.5/10. Published 2026-09-22.

How severe is CVE-2026-83600?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Netdata

CVE-2026-83600

Netdata is an open source observability tool. Prior to 2.10.4, an authenticated child agent can send an oversized CHART SLOT value that str2ull_encoded passes to pluginsd_rrdset_cache_put_to_slot in src/plugins.d/pluginsd_internals.h. The accepted slot drives reallocz to request an approximately 16 GiB chart-pointer array, and allocation failure invokes fatal and aborts the parent Netdata agent, repeatedly disabling centralized monitoring while stream access persists. This issue is fixed in version 2.10.4 and nightly build 2.10.0-782-nightly.

Published 2026-09-22 · last modified 2026-09-22.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Netdata — versions < 2.10.4

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-83600?: CVE-2026-83600 is a medium-severity vulnerability in Netdata, classified under Off-by-one Error. CVSS score: 6.5/10. Published 2026-09-22.
How severe is CVE-2026-83600?: Medium severity. CVSS v3 base score is 6.5 out of 10.