---
title: "Security digest: March 23, 2026"
url: https://erroneo.us/security/2026-03-23/
description: "March 23, 2026 vulnerability digest: 2 critical advisories (Composer (PHP), Go). What to patch and who can relax."
type: security-digest-day
section: "Security Digest"
date_published: 2026-03-23
date_modified: 2026-03-23
publisher: erroneo.us
author: erroneo.us Security Desk
license: All rights reserved. Quote with attribution and a link.
---

# Security digest: March 23, 2026

2 critical advisories.

## Take stock

- Composer (PHP): 1 critical advisory ( mantisbt/mantisbt ). Check with composer audit .
- Go: 1 critical advisory ( github.com/goharbor/harbor ). Check with govulncheck ./... .
- None of it touches your stack? Then there is nothing to do today. That is a result, not a failure to read carefully.

## Known exploited (CISA KEV)

None.

## Critical advisories

- [CVE-2026-30849](https://erroneo.us/security/cve/CVE-2026-30849/index.md) MantisBT is vulnerable to authentication bypass through the SOAP API on MySQL — Composer (PHP) mantisbt/mantisbt < 2.28.1 → 2.28.1
- [CVE-2026-4404](https://erroneo.us/security/cve/CVE-2026-4404/index.md) Harbor allows the use of the default password for web UI login — Go github.com/goharbor/harbor <= 2.15.0 → no fix

---
Source page: https://erroneo.us/security/2026-03-23/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt