TCP backend stream ID overflow_CVE-2026-33596

3.1 / 10

LOW

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Description

A client might theoretically be able to cause a mismatch between queries sent to a backend and the received responses by sending a flood of perfectly timed queries that are routed to a TCP-only or DNS over TLS backend.

Basic Information

ID CVE-2026-33596

Source OX

Published Apr 22, 2026 at 13:47

Modified Apr 22, 2026 at 14:43

Affected Product

Vendor PowerDNS

Product DNSdist

Version 1.9.0

Affected Versions PowerDNS DNSdist 1.9.0
PowerDNS DNSdist 2.0.0

CWE Classification

CWE-190

References

www.dnsdist.org /security-advisories/powerdns-advisory-for-dnsdist-2026-04.html

{
    "lastseen": "",
    "description": "A client might theoretically be able to cause a mismatch between queries sent to a backend and the received responses by sending a flood of perfectly timed queries that are routed to a TCP-only or DNS over TLS backend.",
    "published": "2026-04-22T13:47:10.454Z",
    "modified": "2026-04-22T14:43:54.294Z",
    "type": "cve",
    "title": "TCP backend stream ID overflow",
    "source": "OX",
    "references": "https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.html",
    "id": "CVE-2026-33596",
    "bulletinFamily": "",
    "cwe": [
        "",
        "CWE-190"
    ],
    "cvelist": null,
    "sourceData": "PowerDNS DNSdist 1.9.0\nPowerDNS DNSdist 2.0.0",
    "sourceHref": "",
    "cvss": {
        "score": 3.1,
        "severity": "LOW",
        "vector": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "DNSdist",
    "version": "1.9.0",
    "vendor": "PowerDNS",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}