CVE-2026-104150 AdonisJS HTTP Server: Uncontrolled Resource Consumption and Inefficient Regular Expression Complexity
An attacker can cause denial of service by sending crafted route parameters that trigger excessive CPU usage via inefficient regular expressions in the AdonisJS HTTP server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-104150?
CVE-2026-104150 is a high-severity denial of service vulnerability in adonisjs http-server, published on 15 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
AdonisJS HTTP Server is a package for handling HTTP requests in the AdonisJS framework. Prior to 8.2.2 and 9.1.1, the regular expression returned by router.matchers.slug() contains adjacent greedy repetitions with overlapping character classes. When an application applies this matcher to an attacker-controlled route parameter, a long slug ending in a character rejected by the final assertion causes quadratic backtracking and excessive CPU use. Route matching occurs before route and group middleware, so authentication or rate-limiting middleware attached to the route may not prevent an unauthenticated request from blocking the Node.js event loop and stopping the worker from serving unrelated requests or health checks. This issue is fixed in versions 8.2.2 and 9.1.1.
Which versions are affected by CVE-2026-104150?
4 open source packages ship an affected version, including @adonisjs/http-server.
| Package | Affected | Fixed in |
|---|---|---|
@adonisjs/http-server npm | All versions | 8.2.2 |
@adonisjs/http-server npm | All versions | 8.2.2 |
@adonisjs/http-server npm | From 9.0.0 | 9.1.1 |
@adonisjs/http-server npm | From 9.0.0 | 9.1.1 |
How do I fix CVE-2026-104150?
Upgrade @adonisjs/http-server to a fixed version for your release line: 8.2.2 or 9.1.1.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-104150 being exploited?
There is no known exploitation of CVE-2026-104150 in the wild and no public exploit code.
Sources
Also known as AZL-108290, GHSA-524c-h47v-m3h8.