Package vulnerability, severity high

adminneo-org/adminneo: AdminNeo has Cookie Attribute Injection via Unsanitized X-Forwarded-Prefix in Set-Cookie Headers

Published October 30, 2026, updated October 31, 2026

AdminNeo has Cookie Attribute Injection via Unsanitized X-Forwarded-Prefix in Set-Cookie Headers. Source: GHSA-79wv-8rh2-9vp2 (CVE-2026-96631).

What's affected

• adminneo-org/adminneo (packagist)>=4.6.0 <5.5.1

What to do

1. Upgrade adminneo-org/adminneo to 5.5.1 or later.

Check whether you were affected

Pharon tells teams automatically when this affects something they run. To check a machine, run this in Claude Code with the Pharon plugin, in the repository that uses it:

/pharon:check-incident ghsa-79wv-8rh2-9vp2

References

• https://osv.dev/vulnerability/GHSA-79wv-8rh2-9vp2
• https://github.com/adminneo-org/adminneo/security/advisories/GHSA-79wv-8rh2-9vp2
• https://github.com/adminneo-org/adminneo/commit/aa6f2544a8a65cf5e8317f1a902f74181e136d64
• https://github.com/adminneo-org/adminneo
• https://github.com/adminneo-org/adminneo/releases/tag/v5.5.1

Notice ghsa-79wv-8rh2-9vp2, signed with key feed-prod-2026-10 (Ed25519). The Pharon CLI verifies the signature before using a notice.