PT-2026-7113 · Recursor+2 · Recursor+2

Jianjun Chen + 3 · Published 2026-01-01 · Updated 2026-04-01 · CVE-2026-0398

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Recursor (affected versions not specified)

Description Improperly crafted zones may cause increased resource consumption. Additionally, crafted CNAME chains can lead to cache poisoning within the Recursor.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

BDU:2026-05708

CVE-2026-0398

Affected Products

Powerdns Recursor

Recursor

Red Os

References · 16

• https://osv.dev/vulnerability/DEBIAN-CVE-2026-0398 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-0398 · Security Note
• https://ubuntu.com/security/CVE-2026-0398 · Vendor Advisory
• https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2026-01.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-0398 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-0398 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-05708 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-0398 · Vendor Advisory
• https://t.me/CVEtracker/44213 · Telegram Post
• https://twitter.com/CVEnew/status/2020872424175071273 · Twitter Post
• https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2026-01.html · Note
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti-red-os-8-0/uyazvimost-pdns-recursor-cve-2026-0398-8.0 · Note
• https://twitter.com/VulmonFeeds/status/2020930142051131782 · Twitter Post
• https://redos.red-soft.ru/search/?iblock_id=24&q=CVE-2026-0398 · Note
• https://twitter.com/oss_security/status/2021189571812245982 · Twitter Post