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CVE-2026-33256

Unbounded memory allocation by internal web server

Medium5.3EPSS 0.61%
Published
Updated
Reserved
Assigned by
OX

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.

Scores

CVSS scores of CVE-2026-33256, by who scored it
Scored byCVSSScoreVector
OXCNA (assigner)3.1Medium5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVDNVD · Analyzed3.1High7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.61% · top 51% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: yes · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.

Weakness

Affected products

  • PowerDNS · Recursor

    • affected 5.4.0 – < 5.4.1
    • affected 5.3.0 – < 5.3.6
    • affected 5.2.0 – < 5.2.9

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .