7.5

CVE-2026-33258: powerdns recursor

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-33258DEBIAN-CVE-2026-33258
Published 22-04-2026Last modified 22-04-2026
Open JSON

Vulnerability summary

CVE-2026-33258 is a high (CVSS 7.5) vulnerability in powerdns recursor. EPSS estimates a 0.80% chance of exploitation in the next 30 days, higher than 56.1% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.80%
0%100%
Low · +0.22 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 22-04-2026
    PublishedVulnerability first disclosed.
  2. 22-04-2026
    Last modifiedVulnerability information updated.

Description

By publishing and querying a crafted zone an attacker can cause allocation of large entries in the negative and aggressive NSEC(3) caches.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.80%

Chance of exploitation in the next 30 days

Percentile

56%

Versus all other CVEs

30-day change

+0.22 pp

From 0.58% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.80%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • pdns-recursorAll versions (No fix recorded) | < 5.2.9-0+deb13u1 | < 5.4.1-1
Powerdns1 product
  • recursor≥ 5.4.0, < 5.4.1 | ≥ 5.2.0, < 5.2.9 | ≥ 5.3.0, < 5.3.6 | 5.4.0
Ubuntu1 product
  • pdns-recursorAll versions (No fix recorded)

3 vendors · 3 products

References

5 links