Git is an open-source distributed revision control system. In affected versions of Git a specially crafted repository that contains symbolic links as well as files using a clean/smudge filter such as Git LFS, may cause just-checked out script to be executed while cloning onto a case-insensitive file system such as NTFS, HFS+ or APFS (i.e. the default file systems on Windows and macOS). Note that clean/smudge filters have to be configured for that. Git for Windows configures Git LFS by default, and is therefore vulnerable. The problem has been patched in the versions published on Tuesday, March 9th, 2021. As a workaound, if symbolic link support is disabled in Git (e.g. via `git config --global core.symlinks false`), the described attack won't work. Likewise, if no clean/smudge filters such as Git LFS are configured globally (i.e. _before_ cloning), the attack is foiled. As always, it is best to avoid cloning repositories from untrusted sources. The earliest impacted version is 2.14.2. The fix versions are: 2.30.1, 2.29.3, 2.28.1, 2.27.1, 2.26.3, 2.25.5, 2.24.4, 2.23.4, 2.22.5, 2.21.4, 2.20.5, 2.19.6, 2.18.5, 2.17.62.17.6.
総合評価: CVE-2021-21300 は悪用リスクが高い（86.9/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 88.64%、100 パーセンタイル） 根拠: 公開エクスプロイトが 2 件参照されています（Exploit-DB）。 直近 1 日で EPSS が +30.36% 上昇。悪用への関心が高まっている可能性があります。 推奨対応: 公開エクスプロイトが確認されています。影響範囲の確認、緩和策の適用、パッチ適用を優先してください。
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。
| EDB-ID | ソース | 種別 | 公開 | リンク |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
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 | 58.28% | 88.64% | +30.36% |
| 2 | 2026-06-08 | 61.88% | 58.28% | -3.60% |
| 3 | 2026-05-10 | — | 61.88% | — |
EPSS の全履歴 （全 84 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 |
|---|---|---|---|---|---|---|
| 8.0 | 3.1 | HIGH |
|
1.6 | 5.8 | [email protected] |
| 7.5 | 3.1 | HIGH |
|
1.6 | 5.9 | [email protected] |
| 5.1 | 2.0 | MEDIUM |
|
4.9 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
high | CVE-2021-21300: 1 source package rows (git); 41 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 11, open 30. | https://security.alpinelinux.org/vuln/CVE-2021-21300 |
debian
|
not yet assigned | CVE-2021-21300 not yet assigned priority: Debian including 1 source packages (git), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2021-21300 |
gentoo
|
normal | CVE-2021-21300: 1 GLSA(s) (202104-01), 1 atom(s) (dev-vcs/git); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2021-21300 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2021-21300 |
suse
|
high | CVE-2021-21300 severity important: SUSE including 148 source package names (1.16-13.3:git-core-2.31.1-10.3.1, 1.17-12.3:git-core-2.31.1-10.3.1, …), 625 product×package rows across 77 product lines (Container bci/golang, Container bci/node, … (77 product lines)): Fixed 529, Known Not Affected 96. | https://www.suse.com/security/cve/CVE-2021-21300/ |
ubuntu
|
medium | CVE-2021-21300 medium priority: Ubuntu including 1 source packages (git), 6 status rows across 6 suites (bionic, focal, groovy, trusty, upstream, xenial): released 4, DNE 1, needs-triage 1. | https://ubuntu.com/security/CVE-2021-21300 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| git-scm | git | <= 2.14.2 | cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:* |
| git-scm | git | >= 2.17.0, < 2.17.6 | cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:* |
| git-scm | git | >= 2.18.0, < 2.18.5 | cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:* |
| git-scm | git | >= 2.19.0, < 2.19.6 | cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:* |
| git-scm | git | >= 2.20.0, < 2.20.5 | cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:* |
| git-scm | git | >= 2.21.0, < 2.21.4 | cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:* |
| git-scm | git | >= 2.22.0, < 2.22.5 | cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:* |
| git-scm | git | >= 2.23.0, < 2.23.4 | cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:* |
| git-scm | git | >= 2.24.0, < 2.24.4 | cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:* |
| git-scm | git | >= 2.25.0, < 2.25.5 | cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:* |
| git-scm | git | >= 2.26.0, < 2.26.3 | cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:* |
| git-scm | git | >= 2.29.0, < 2.29.3 | cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:* |
| git-scm | git | >= 2.30.0, < 2.30.2 | cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:* |
| git-scm | git | 2.27.0 | cpe:2.3:a:git-scm:git:2.27.0:*:*:*:*:*:*:* |
| git-scm | git | 2.28.0 | cpe:2.3:a:git-scm:git:2.28.0:*:*:*:*:*:*:* |
| fedoraproject | fedora | 32 | cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* |
| fedoraproject | fedora | 33 | cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* |
| fedoraproject | fedora | 34 | cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* |
| apple | xcode | < 12.5 | cpe:2.3:a:apple:xcode:*:*:*:*:*:*:*:* |
| debian | debian_linux | 10.0 | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |