How severe is CVE-2026-42005?

CVE-2026-42005 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-42005 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-42005?

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

Does CVE-2026-42005 have an EU (EUVD) identifier?

Yes. CVE-2026-42005 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39345.

When was CVE-2026-42005 published?

CVE-2026-42005 was published on 2026-06-25.

CVE-2026-42005

CVE-2026-42005 is a medium-severity vulnerability with a CVSS 3.x base score of 4.3. 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-400.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-39345
Weakness: CWE-400
Published: 2026-06-25
Last modified: 2026-06-25

Description

An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.

Frequently asked questions

What is CVE-2026-42005?: An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.
How severe is CVE-2026-42005?: CVE-2026-42005 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-42005 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-42005?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-42005 have an EU (EUVD) identifier?: Yes. CVE-2026-42005 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39345.
When was CVE-2026-42005 published?: CVE-2026-42005 was published on 2026-06-25.

References

https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-powerdns-2026-07.html

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