Is CVE-2026-104150 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-104150 being exploited in the wild.

How severe is CVE-2026-104150?

Medium severity, published 15 October 2026.

Which products and versions are affected?

AdonisJS HTTP Server versions before 8.2.2 and 9.1.1; @adonisjs/http-server (npm) >= 9.0.0, < 9.1.1, SEMVER:introduced=9.0.0,fixed=9.1.1.

How is CVE-2026-104150 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-104150?

Check whether you run AdonisJS HTTP Server or @adonisjs/http-server (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-104150: AdonisJS HTTP Server ReDoS in slug route matcher

Q: Is there a fix for CVE-2026-104150?

Yes. @adonisjs/http-server (npm): upgrade to 9.1.1 or later. Until then: Avoid using router.matchers.slug() on route parameters or use alternative route matching strategies that do not rely on the vulnerable regex pattern. Reverse-proxy request-line limits may reduce individual request processing time but do not fully mitigate the vulnerability. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-104150 attacked?

It is attacked over the network, in a software library.

Q: Am I affected by CVE-2026-104150?

Check whether you run AdonisJS HTTP Server or @adonisjs/http-server (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-104150 · Severity: medium · Published 2026-10-15

AdonisJS is a Node.js web framework that uses route matchers to parse URL paths. The built-in slug matcher contains a vulnerable regular expression that can be exploited by sending specially crafted URLs to routes using this matcher. An attacker can cause the application to consume excessive CPU and become unresponsive to legitimate requests without needing to authenticate.

Technologies: AdonisJS HTTP Server, @adonisjs/http-server (npm). Vendors: AdonisJS, npm.

Quick answers

Is CVE-2026-104150 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-104150 being exploited in the wild.
How severe is CVE-2026-104150?: Medium severity, published 15 October 2026.
Which products and versions are affected?: AdonisJS HTTP Server versions before 8.2.2 and 9.1.1; @adonisjs/http-server (npm) >= 9.0.0, < 9.1.1, SEMVER:introduced=9.0.0,fixed=9.1.1.
Is there a fix for CVE-2026-104150?: Yes. @adonisjs/http-server (npm): upgrade to 9.1.1 or later. Until then: Avoid using router.matchers.slug() on route parameters or use alternative route matching strategies that do not rely on the vulnerable regex pattern. Reverse-proxy request-line limits may reduce individual request processing time but do not fully mitigate the vulnerability. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-104150 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-104150?: Check whether you run AdonisJS HTTP Server or @adonisjs/http-server (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

@adonisjs/http-server (npm): upgrade to 9.1.1 or later
```
npm install @adonisjs/http-server@9.1.1
```

Avoid using router.matchers.slug() on route parameters or use alternative route matching strategies that do not rely on the vulnerable regex pattern. Reverse-proxy request-line limits may reduce individual request processing time but do not fully mitigate the vulnerability.

Technical details

A Regular Expression Denial of Service (ReDoS) vulnerability exists in the slug route matcher's regex pattern (/^[^\s-_](?!.*?[-_]{2,})([a-z0-9-\\]{1,})[^\s]*[^-_\s]$/) which has adjacent greedy quantifiers with overlapping character classes, causing quadratic O(n^1.98) execution time. The matcher is evaluated against URL segments during routing before middleware execution, allowing unauthenticated attackers to trigger the vulnerability. A specially crafted request with a long string can block the Node.js event loop and make the application unresponsive.

Affected products

AdonisJS HTTP Server versions before 8.2.2 and 9.1.1

Identifiers

CVE-2026-104150
GHSA-524c-h47v-m3h8

Timeline

2026-10-15: disclosed

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