CVE-2026-33609: powerdns authoritative LDAP Injection
CVSS: 6.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-33609DEBIAN-CVE-2026-33609
Published 22-04-2026Last modified 22-04-2026
Vulnerability summary
CVE-2026-33609 is a medium (CVSS 6.5) LDAP Injection vulnerability in powerdns authoritative. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 38.6% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (NVD)EPSS score
0.46%
0%100%
Low · +0.22 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 22-04-2026PublishedVulnerability first disclosed.
- 22-04-2026Last modifiedVulnerability information updated.
Description
Incomplete escaping of LDAP queries when running with 8bit-dns enabled allows users to perform queries of internal domain subtrees.
CVSS metrics
4 scores · 4 sources · 1 versionMedium 6.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NSources4 sources · 5.3–6.5
- CVE.orgCNA5.3MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:NDiffers
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS trend
Probability
0.46%
Chance of exploitation in the next 30 days
Percentile
39%
Versus all other CVEs
30-day change
+0.22 pp
From 0.24% on 20-09-2026
20-09-202620-10-2026
EPSS score0.46%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian1 product
- pdnsAll versions (No fix recorded) | < 4.9.14-0+deb13u1 | < 5.0.4-1
Powerdns1 product
- authoritative≥ 4.9.0, < 4.9.14 | ≥ 5.0.0, < 5.0.4
Ubuntu1 product
- pdnsAll versions (No fix recorded)
3 vendors · 3 products
References
5 links- docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-powerdns-2026-05.htmlBroken LinkVendor Advisory
