How severe is CVE-2026-33595?

CVE-2026-33595 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-33595 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33595?

CVE-2026-33595 affects Powerdns Dnsdist. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33595?

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

Does CVE-2026-33595 have an EU (EUVD) identifier?

Yes. CVE-2026-33595 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24933.

When was CVE-2026-33595 published?

CVE-2026-33595 was published on 2026-04-22 and last updated on 2026-06-17.

CVE-2026-33595

CVE-2026-33595 is a medium-severity vulnerability in Powerdns Dnsdist with a CVSS 3.x base score of 5.3. 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-770.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-24933
Weakness: CWE-770
Affected product: Powerdns Dnsdist
Published: 2026-04-22
Last modified: 2026-06-17

Description

A client can trigger excessive memory allocation by generating a lot of errors responses over a single DoQ and DoH3 connection, as some resources were not properly released until the end of the connection.

Frequently asked questions

What is CVE-2026-33595?: A client can trigger excessive memory allocation by generating a lot of errors responses over a single DoQ and DoH3 connection, as some resources were not properly released until the end of the connection.
How severe is CVE-2026-33595?: CVE-2026-33595 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-33595 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33595?: CVE-2026-33595 affects Powerdns Dnsdist. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33595?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33595 have an EU (EUVD) identifier?: Yes. CVE-2026-33595 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24933.
When was CVE-2026-33595 published?: CVE-2026-33595 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:*:*:*:*:*:*:*:*

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