CVE-2026-42007

Katalog CVE

CVSS 9.1 · Critical EPSS 0,35%

Kerentanan Use After Free. Skor CVSS 3.1 9.1 (Critical) menurut open-xchange.com.

Deskripsi (NVD)

An attacker that has valid credentials can use a Sieve script with the editheader extension to trigger a use-after-free in the mail editing code, and to write memory contents beyond the intended buffer into the delivered mail. This causes memory leak and opportunity to do memory corruption during mail delivery, which can crash the delivery process and may allow execution of arbitrary code in the context of that process. Disable the Sieve editheader extension. Update to non-vulnerable version. No publicly available exploits are known.

Rincian

Terbit di NVD

28 Agustus 2026

Terakhir diubah

3 September 2026

Status NVD

Deferred

CVSS 3.1

9.1 (Critical), sumber open-xchange.com
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-416: Use After Free

EPSS (30 hari)

0,35% peluang dieksploitasi; lebih tinggi dari 26,1% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0003.json