CVE-2026-40255: AdonisJS HTTP Server is a package for handling HTTP requests in the AdonisJS framework

Routine

MEDIUM 6.1UPGRADEUPGRADE

CVE-2026-40255 is a medium-severity flaw (CVSS 6.1) affecting http-server, core. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

AdonisJS HTTP Server is a package for handling HTTP requests in the AdonisJS framework. In @adonisjs/http-server versions prior to 7.8.1 and 8.0.0-next.0 through 8.1.3, and @adonisjs/core versions prior to 7.4.0, the response.redirect().back() method reads the Referer header from the incoming HTTP request and redirects to that URL without validating the host.An attacker who can influence the Referer header can cause the application to redirect us

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 84%)
CISA exploited list	No
Weakness	CWE-601
Published	2026-04-16
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: adonisjs

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-16 23:16 UTCPublished CVE record published
2026-10-26 00:10 UTCUpdated Record last modified

adonisjs http-server UPGRADE

Affected: < 7.8.1 · > 8.0.0 and <= 8.1.3

Fixed in: 7.8.1

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls http-server

2. UPGRADE to 7.8.1

npm install http-server@">=7.8.1"

adonisjs core UPGRADE

Affected: <= 7.3.0

Fixed in: newer than 7.3.0

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls core

2. UPGRADE to newer than 7.3.0

npm install core@">7.3.0"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-40255?

http-server: upgrade to 7.8.1; core: upgrade to newer than 7.3.0. Exact commands for each OS are on this page.

Is CVE-2026-40255 being exploited?

CVE-2026-40255 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-40255 affect?

CVE-2026-40255 affects http-server, core. Severity is medium (CVSS 6.1). AdonisJS HTTP Server is a package for handling HTTP requests in the AdonisJS framework. In @adonisjs/http-server versions prior to 7.8.1 and 8.0.0-next.0 through 8.1.3, and @adonisjs/core versions prior to 7.4.0, the response.redirect().bac

How urgent is CVE-2026-40255?

Priority 25/100. No elevated risk signals yet.

References

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