CVE-2026-83602

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-83602
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-83602.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-83602
Aliases
  • GHSA-8hjg-8hcf-fmwp
Downstream
Published
2026-09-22T16:56:56Z
Modified
2026-10-28T11:18:46Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L CVSS Calculator
Summary
Netdata: Unauthenticated remote PUT to /api/v3/settings bypasses IP allowlist controls via HTTP_ACL_NOCHECK
Details

Netdata is an open source observability tool. From 2.0.0 until 2.11.0, Netdata registers /api/v3/settings in src/web/api/v3/web_api_v3.c with HTTP_ACL_NOCHECK and HTTP_ACCESS_ANONYMOUS_DATA, causing unauthenticated PUT requests handled by src/web/api/v3/api_v3_settings.c to bypass operator-configured allow dashboard from IP restrictions. A network-reachable caller can persist attacker-controlled JSON in {varlib}/settings/default.json, manipulate its version counter, and use repeated near-20 MiB writes to consume disk space, although the file does not control collection or security policy. This vulnerability is fixed in 2.11.0.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-284"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83602.json"
}
References

Affected packages

Git / github.com/netdata/netdata

Affected ranges

Type
GIT
Repo
https://github.com/netdata/netdata
Events
Introduced
92b67c5bfd8ee40b4443ce3911608a2d91a50a24
Fixed
bb8f509e99cad230d3acc1fdfc840224f3b3db3a
Fixed
0124f50bbcf36c23e798e2b76f021f5032ec93d4
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "2.0.0"
                },
                {
                    "fixed": "2.11.0"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "0124f50bbcf36c23e798e2b76f021f5032ec93d4"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "v2.11.0",
            "range": [
                {
                    "fixed": "bb8f509e99cad230d3acc1fdfc840224f3b3db3a"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

v2.*
v2.0.0
v2.1.0
v2.10.0
v2.2.0
v2.3.0
v2.4.0
v2.5.0
v2.6.0
v2.7.0
v2.8.0
v2.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-83602.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "140032258092207825914538942930511512171",
                "188182553303030436199424371261900096189",
                "150771813883890436116221791519646158586",
                "121082196633926126176061243272209717734"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-83602-44f707e1",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/netdata/netdata/commit/0124f50bbcf36c23e798e2b76f021f5032ec93d4",
        "target": {
            "file": "src/web/api/web_api_v3.c"
        }
    }
]
vanir_signatures_modified 
"2026-10-28T11:18:46Z"