Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-24029— DNS over HTTPS ACL bypass

Quick assessment

Affected
PowerDNS DNSdist
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PowerDNS DNSdist是PowerDNS公司的一个提供DNS流量负载均衡与安全防护能力的代理软件。 PowerDNS DNSdist存在安全漏洞，该漏洞源于禁用early_acl_drop选项时跳过ACL检查，可能导致所有客户端发送DoH查询。

CVSS 6.5 · Medium EPSS 0.15% · P3

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-24029

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
DNS over HTTPS ACL bypass
Source: CVE Program / CVE List V5
Vulnerability Description
When the early_acl_drop (earlyACLDrop in Lua) option is disabled (default is enabled) on a DNS over HTTPs frontend using the nghttp2 provider, the ACL check is skipped, allowing all clients to send DoH queries regardless of the configured ACL.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
PowerDNS DNSdist 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PowerDNS DNSdist是PowerDNS公司的一个提供DNS流量负载均衡与安全防护能力的代理软件。 PowerDNS DNSdist存在安全漏洞，该漏洞源于禁用early_acl_drop选项时跳过ACL检查，可能导致所有客户端发送DoH查询。
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

Vendor Product Affected Versions CPE Subscribe
PowerDNS DNSdist 1.9.0 ~ 1.9.12 -

II. Public POCs for CVE-2026-24029

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-24029

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-24029 (1)

Same Patch Batch · PowerDNS · 2026-03-31 · 7 CVEs total

CVE-2026-27853 5.9 MEDIUM Out-of-bounds write when rewriting large DNS packets
CVE-2026-24030 5.3 MEDIUM Unbounded memory allocation for DoQ and DoH3
CVE-2026-24028 5.3 MEDIUM Out-of-bounds read when parsing DNS packets via Lua
CVE-2026-27854 4.8 MEDIUM Use after free when parsing EDNS options in Lua
CVE-2026-0397 3.1 LOW Information disclosure via CORS misconfiguration
CVE-2026-0396 3.1 LOW HTML injection in the web dashboard

IV. Related Vulnerabilities

Same product: DNSdist
Same vendor: PowerDNS

V. Comments for CVE-2026-24029

No comments yet

Leave a comment