How severe is CVE-2026-42002?

CVE-2026-42002 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-42002 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42002?

CVE-2026-42002 affects Powerdns Authoritative. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42002?

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

Does CVE-2026-42002 have an EU (EUVD) identifier?

Yes. CVE-2026-42002 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31260.

When was CVE-2026-42002 published?

CVE-2026-42002 was published on 2026-05-21 and last updated on 2026-06-17.

CVE-2026-42002

CVE-2026-42002 is a medium-severity vulnerability in Powerdns Authoritative with a CVSS 3.x base score of 5.9. 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-364.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-31260
Weakness: CWE-364
Affected product: Powerdns Authoritative
Published: 2026-05-21
Last modified: 2026-06-17

Description

Concurrency and locking defects in GSS-TSIG

Frequently asked questions

What is CVE-2026-42002?: Concurrency and locking defects in GSS-TSIG
How severe is CVE-2026-42002?: CVE-2026-42002 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-42002 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42002?: CVE-2026-42002 affects Powerdns Authoritative. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42002?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-42002 have an EU (EUVD) identifier?: Yes. CVE-2026-42002 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31260.
When was CVE-2026-42002 published?: CVE-2026-42002 was published on 2026-05-21 and last updated on 2026-06-17.

References

https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-powerdns-2026-06.html

Affected products (1)

cpe:2.3:a:powerdns:authoritative:*:*:*:*:*:*:*:*

More vulnerabilities in Powerdns Authoritative

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CVE-2026-42001 — High (CVSS 7.5): Insufficient Validation of Autoprimary SOA Queries
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Other CWE-364 vulnerabilities

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CVE-2020-14317 — Medium (CVSS 5.5): It was found that the issue for security flaw CVE-2019-3805 appeared again in a further version of JBoss Enterprise…
CVE-1999-0035 — Medium (CVSS 5.4): Race condition in signal handling routine in ftpd, allowing read/write arbitrary files.
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