When dovecot has been configured to use per-domain passwd files, and they are placed one path component above /etc, or slash has been added to allowed characters, path traversal can happen if the domain component is directory partial. This allows inadvertently reading /etc/passwd (or some other path which ends with passwd). If this file contains passwords, it can be used to authenticate wrongly, or if this is userdb, it can unexpectly make system users appear valid users. Upgrade to fixed version, or use different authentication scheme that does not rely on paths. Alternatively you can also ensure that the per-domain passwd files are in some other location, such as /etc/dovecot/auth/%d. No publicly available exploits are known.
総合評価: CVE-2026-0394 は低リスク（33.5/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 0.43%、34 パーセンタイル） 推奨対応: 悪用情報と EPSS の推移を監視し、必要に応じて優先度を見直してください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置（高いほど相対的に深刻）を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ（新 − 旧） |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.03% | 0.43% | +0.40% |
| 2 | 2026-05-22 | 0.05% | 0.03% | -0.02% |
| 3 | 2026-04-02 | — | 0.05% | — |
EPSS の全履歴 （全 4 件）
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 5.3 | 3.1 | MEDIUM |
|
3.9 | 1.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2026-0394 not yet assigned priority: Debian including 1 source packages (dovecot), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2026-0394 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2026-0394 |
suse
|
medium | CVE-2026-0394 severity moderate: SUSE including 8 source package names (dovecot, dovecot24, …), 35 product×package rows across 21 product lines (SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS, SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS, … (21 product lines)): Known Not Affected 35. | https://www.suse.com/security/cve/CVE-2026-0394/ |
ubuntu
|
medium | CVE-2026-0394 medium priority: Ubuntu including 1 source packages (dovecot), 9 status rows across 9 suites (bionic, focal, jammy, noble, questing, resolute, trusty, upstream, xenial): needed 4, released 3, not-affected 2. | https://ubuntu.com/security/CVE-2026-0394 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| dovecot | dovecot | < 2.4.0 | cpe:2.3:a:dovecot:dovecot:*:*:*:*:*:*:*:* |
| open-xchange | dovecot | < 3.1.0 | cpe:2.3:a:open-xchange:dovecot:*:*:*:*:pro:*:*:* |