---
cve: "CVE-2026-61915"
severity: "MEDIUM"
cvss: 4.2
epss: "0.3%"
vendor: "cyrusimap"
kev: false
exploited: false
published: "2026-09-09 20:18:36"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T09:29:24+02:00"
---

# CVE-2026-61915

> 4.2 MEDIUM

## Beschreibung

An issue was discovered in Cyrus IMAP before 3.12.4. There is a VPATCH BYPARAM double-free. An authenticated calendar user could crash a Cyrus CalDAV worker with a PATCH containing PATCH-ACTION="BYPARAM@..." against a resource with two or more properties of the matched kind. The memory holding the selector would be freed once on each iteration over the properties.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Gering | warn |

## Patch verfügbar (OSV)

- 08031fd42e027bdb5bc286e428a03e1c53c2e105 (Commit)
- ad6d4e67d0edbdf99e7ce31658c67640f30479c4 (Commit)

## Referenzen

- <https://cyrusimap.org>
- <https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.4.html>
- <https://www.cyrusimap.org/3.12/imap/download/release-notes/3.10/x/3.10.4.html>
- <https://www.cyrusimap.org/3.12/imap/download/release-notes/3.8/x/3.8.8.html>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-61915) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_