🛡️ CVE-2026-42002 — authoritative

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

• Attack vector: Network — reachable from anywhere that can route to the service.
• Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
• Privileges required: None — an unauthenticated stranger can try it.
• User interaction: None — nobody has to be tricked into anything.
• Scope: Unchanged — the damage stays inside the vulnerable component.
• Confidentiality impact: None.
• Integrity impact: None.
• Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2026-42002 is classified as CWE-364: Signal Handler Race Condition. The product uses a signal handler that introduces a race condition.

Affected software

CVE-2026-42002 is recorded against 1 package.

• authoritative (from 5.0.0 up to 5.0.5)

Timeline and source

Published on 21 May 2026 and last revised on 23 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

docs.powerdns.com

Other advisories for this package

authoritative has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CVE-2026-42000 (6.8 Medium, published 21 May 2026)
• CVE-2026-41999 (4.8 Medium, published 21 May 2026)
• CVE-2026-42396 (4.9 Medium, published 21 May 2026)
• CVE-2026-42001 (7.5 High, published 21 May 2026)
• CVE-2026-33260 (5.3 Medium, published 22 Apr 2026)
• CVE-2026-33257 (5.3 Medium, published 22 Apr 2026)
• CVE-2026-33611 (6.5 Medium, published 22 Apr 2026)
• CVE-2026-33610 (5.9 Medium, published 22 Apr 2026)

Same weakness in other software

These advisories are the same class of weakness (CWE-364: Signal Handler Race Condition) in other software:

• CVE-2026-33565 (3.3 Low, published 19 May 2026)
• CVE-2026-27766 (5.5 Medium, published 19 May 2026)
• CVE-2026-24792 (8.1 High, published 19 May 2026)
• CVE-2025-4598 (4.7 Medium, published 30 May 2025)
• CVE-2024-6409 (7.0 High, published 8 Jul 2024)
• CVE-2024-6387 (8.1 High, published 1 Jul 2024)
• CVE-2023-5676 (4.1 Medium, published 15 Nov 2023)
• CVE-2023-1285 (7.5 High, published 14 Apr 2023)

CVE-2026-42002 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Affected Packages

References