3.7
LOW
CVSS 3.1
CVE-2026-40208
Denial of service via DoH3 queries
Overview
Description
An attacker might be able to delay the processing of DoH3 queries by sending DoH3 GET queries with an invalid DATA frame.
Details
INFO
Published Date :
June 25, 2026, 12:22 p.m.
Last Modified :
June 25, 2026, 12:22 p.m.
Remotely Exploit :
Yes !
Source :
OX
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | LOW | 8ce71d90-2354-404b-a86e-bec2cc4e6981 | ||||
| CVSS 3.1 | LOW | [email protected] |
Solution
Implement DoH3 query validation to prevent DoS attacks.
- Validate incoming DoH3 GET queries.
- Ensure DATA frames are correctly formatted.
- Reject malformed queries promptly.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-40208 vulnerability anywhere in the article.
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.