GHSA-897w-fcg9-f6xj · 深刻度： high · エコシステム： pip — Dulwich has an arbitrary file write via NTFS-hostile tree entries on Windows
Dulwich is a pure-Python implementation of the Git file formats and protocols. Versions starting with 0.10.0 and prior to 1.2.5 have an arbitrary file write leading to remote code execution when cloning or checking out a malicious Git repository on Windows. Dulwich's path-element validator accepted tree entries whose filenames contained bytes that Windows interprets as structural path syntax. Contributing configuration bugs made matters worse. The core.protectNTFS and core.protectHFS settings were looked up under a wrong option name and so user-set values were silently ignored, and core.protectNTFS only defaulted to true on Windows (Git upstream has defaulted it to true everywhere since CVE-2019-1353). Both have been corrected. Anyone who clones, fetches, or checks out an untrusted repository with Dulwich on Windows - either through the Dulwich CLI, porcelain.clone, or any downstream tool built on Dulwich - is impacted. POSIX clones are not directly exploitable (on POSIX \ is a literal filename byte), but a POSIX user can unknowingly propagate a malicious tree to Windows consumers via push or re-publication. This issue is fixed in Dulwich 1.2.5. Users should upgrade to 1.2.5 or later. There is no effective pre-patch workaround. On affected versions the core.protectNTFS configuration key was silently ignored, so setting it to true does not mitigate the issue. Users who cannot upgrade should avoid cloning, fetching, or checking out untrusted repositories with Dulwich on Windows. After upgrading the NTFS validator is on by default on every platform, so no additional configuration is required.
総合評価: CVE-2026-42305 は中リスク（51/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 0.64%、46 パーセンタイル） 推奨対応: 影響資産を整理し、修補計画に組み込んでください。
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 | 2026-06-23 | 0.85% | 0.64% | -0.22% |
| 2 | 2026-06-15 | 0.22% | 0.85% | +0.63% |
| 3 | 2026-06-11 | — | 0.22% | — |
EPSS の全履歴 （全 3 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 |
|---|---|---|---|---|---|---|
| 8.8 | 3.1 | HIGH |
|
2.8 | 5.9 | [email protected] |
GHSA-897w-fcg9-f6xj · 深刻度： high · エコシステム： pip — Dulwich has an arbitrary file write via NTFS-hostile tree entries on Windows
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2026-42305 unimportant priority: Debian including 1 source packages (dulwich), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2026-42305 |
suse
|
medium | CVE-2026-42305 severity moderate: SUSE including 3 source package names (python311-dulwich-1.2.5-1.1, python313-dulwich-1.2.5-1.1, python314-dulwich-1.2.5-1.1), 3 product×package rows across 1 product lines (openSUSE Tumbleweed): Fixed 3. | https://www.suse.com/security/cve/CVE-2026-42305/ |
ubuntu
|
medium | CVE-2026-42305 medium priority: Ubuntu including 1 source packages (dulwich), 7 status rows across 7 suites (bionic, focal, jammy, noble, questing, resolute, upstream): needs-triage 6, released 1. | https://ubuntu.com/security/CVE-2026-42305 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| データセットに影響を受ける製品はありません。 | |||