Is CVE-2026-42396 in the CISA KEV catalog?

No. CVE-2026-42396 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-42396?

CVE-2026-42396 has a CVSS v3 base score of 4.9 (MEDIUM).

What is the EPSS score for CVE-2026-42396?

CVE-2026-42396 has an EPSS score of 0.35% (27th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-42396?

Upgrade pdns on debian 13 to 4.9.15-0+deb13u1 or later.

CVE & CISA-KEV Catalog

CVE-2026-42396

MEDIUM

4.9

CVSS v3

NVD

Description

Insufficient Validation of Member Zone Data May Cause Catalog Zone Transfer to Fail

CWE-94Code Injection

How to fix

Remediation Available

pdnsDebian

Fixed in:4.9.15-0+deb13u1CVE-2026-42396

Fixed in:5.0.5-1CVE-2026-42396

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.35%probability of exploitation in 30 days

27thpercentile

Low risk: more likely to be exploited than 27% of all known CVEs.

References

Other references1

docs.powerdns.com

Related Vulnerabilities

Other CWE-94 (Code Injection) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-9841	Critical	9.8	100%	KEV	Fix
CVE-2015-1635	Critical	9.8	100%	KEV	-
CVE-2022-22954	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-22204	Medium	6.8	100%	KEV	Fix
CVE-2025-3248	Critical	9.8	100%	KEV	Fix
CVE-2012-0158	High	8.8	100%	KEV	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-26.