How severe is CVE-2026-33596?

CVE-2026-33596 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-33596 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33596?

CVE-2026-33596 affects Powerdns Dnsdist. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33596?

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

Does CVE-2026-33596 have an EU (EUVD) identifier?

Yes. CVE-2026-33596 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24935.

When was CVE-2026-33596 published?

CVE-2026-33596 was published on 2026-04-22 and last updated on 2026-06-17.

CVE-2026-33596

CVE-2026-33596 is a low-severity vulnerability in Powerdns Dnsdist with a CVSS 3.x base score of 3.1. 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-190.

Key facts

Severity: Low (CVSS 3.x base score 3.1)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-24935
Weakness: CWE-190
Affected product: Powerdns Dnsdist
Published: 2026-04-22
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-33596?: 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.
How severe is CVE-2026-33596?: CVE-2026-33596 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-33596 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33596?: CVE-2026-33596 affects Powerdns Dnsdist. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33596?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33596 have an EU (EUVD) identifier?: Yes. CVE-2026-33596 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24935.
When was CVE-2026-33596 published?: CVE-2026-33596 was published on 2026-04-22 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:powerdns:dnsdist:*:*:*:*:*:*:*:*

More vulnerabilities in Powerdns Dnsdist

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CVE-2026-24029 — Medium (CVSS 6.5): When the early_acl_drop (earlyACLDrop in Lua) option is disabled (default is enabled) on a DNS over HTTPs frontend…
CVE-2026-27853 — Medium (CVSS 5.9): An attacker might be able to trigger an out-of-bounds write by sending crafted DNS responses to a DNSdist using the…
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