CVE-2026-33258— Crafted zones can cause increased resource usage
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-33258
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Crafted zones can cause increased resource usage
Source: NVD (National Vulnerability Database)
Vulnerability Description
By publishing and querying a crafted zone an attacker can cause allocation of large entries in the negative and aggressive NSEC(3) caches.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
PowerDNS Recursor（pdns_recursor） 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PowerDNS Recursor（pdns_recursor）是荷兰PowerDNS公司的一款域名解析服务器。 PowerDNS Recursor存在安全漏洞，该漏洞源于攻击者可发布和查询特制区域，导致在否定和积极NSEC(3)缓存中分配大型条目。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-33258
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-33258
请登录查看更多情报信息。
Same Patch Batch · PowerDNS · 2026-04-22 · 22 CVEs total
| CVE-2026-33593 | 7.5 HIGH | Denial of service via crafted DNSCrypt query |
| CVE-2026-33608 | 7.4 HIGH | Incomplete domain name sanitization during |
| CVE-2026-33602 | 6.5 MEDIUM | Off-by-one access when processing crafted UDP responses |
| CVE-2026-33611 | 6.5 MEDIUM | Insufficient validation of HTTPS and SVCB records |
| CVE-2026-33261 | 5.9 MEDIUM | Null pointer accces in aggressive NSEC(3) cache |
| CVE-2026-33262 | 5.9 MEDIUM | Insufficient validation of cookie reply |
| CVE-2026-33610 | 5.9 MEDIUM | Possible file descriptor exhaustion in forward-dnsupdate |
| CVE-2026-33260 | 5.3 MEDIUM | Insufficient input validation of internal webserver |
| CVE-2026-33609 | 5.3 MEDIUM | LDAP DN injection |
| CVE-2026-33254 | 5.3 MEDIUM | Resource exhaustion via DoQ/DoH3 connections |
| CVE-2026-33595 | 5.3 MEDIUM | DoQ/DoH3 excessive memory allocation |
| CVE-2026-33594 | 5.3 MEDIUM | Outgoing DoH excessive memory allocation |
| CVE-2026-33256 | 5.3 MEDIUM | Unbounded memory allocation by internal web server |
| CVE-2026-33257 | 5.3 MEDIUM | Insufficient input validation of internal webserver |
| CVE-2026-33259 | 5.0 MEDIUM | Concurrent modification of RPZ data can lead to denial of servce |
| CVE-2026-33598 | 4.8 MEDIUM | Out-of-bounds read in cache inspection via Lua |
| CVE-2026-33601 | 4.4 MEDIUM | Insufficient validation of zonemd record |
| CVE-2026-33600 | 4.4 MEDIUM | Null pointer dereference in RPZ transfer |
| CVE-2026-33597 | 3.7 LOW | PRSD detection denial of service |
| CVE-2026-33596 | 3.1 LOW | TCP backend stream ID overflow |
Showing top 20 of 22 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Recursor
- CVE-2026-33262
Insufficient validation of cookie reply - CVE-2026-33261
Null pointer accces in aggressive NSEC(3) cache - CVE-2026-33259
Concurrent modification of RPZ data can lead to denial of se - CVE-2026-33256
Unbounded memory allocation by internal web server - CVE-2026-33601
Insufficient validation of zonemd record
V. Comments for CVE-2026-33258
No comments yet