GHSA-fcv2-xgw5-pqxf · 深刻度： medium · エコシステム： go — sigstore legacy TUF client allows for arbitrary file writes with target cache path traversal
sigstore framework is a common go library shared across sigstore services and clients. In versions 1.10.3 and below, the legacy TUF client (pkg/tuf/client.go) supports caching target files to disk. It constructs a filesystem path by joining a cache base directory with a target name sourced from signed target metadata; however, it does not validate that the resulting path stays within the cache base directory. A malicious TUF repository can trigger arbitrary file overwriting, limited to the permissions that the calling process has. Note that this should only affect clients that are directly using the TUF client in sigstore/sigstore or are using an older version of Cosign. Public Sigstore deployment users are unaffected, as TUF metadata is validated by a quorum of trusted collaborators. This issue has been fixed in version 1.10.4. As a workaround, users can disable disk caching for the legacy client by setting SIGSTORE_NO_CACHE=true in the environment, migrate to https://github.com/sigstore/sigstore-go/tree/main/pkg/tuf, or upgrade to the latest sigstore/sigstore release.
総合評価: CVE-2026-24137 は低リスク（33.6/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 0.37%、29 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 | 0.01% | 0.37% | +0.36% |
| 2 | 2026-01-23 | — | 0.01% | — |
EPSS の全履歴 （全 2 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 |
|---|---|---|---|---|---|---|
| 5.8 | 3.1 | MEDIUM |
|
1.3 | 4.0 | [email protected] |
GHSA-fcv2-xgw5-pqxf · 深刻度： medium · エコシステム： go — sigstore legacy TUF client allows for arbitrary file writes with target cache path traversal
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2026-24137 not yet assigned priority: Debian including 1 source packages (golang-github-sigstore-sigstore), 3 status rows across 3 suites (forky, sid, trixie): resolved 2, open 1. | https://security-tracker.debian.org/tracker/CVE-2026-24137 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2026-24137 |
suse
|
medium | CVE-2026-24137 severity moderate: SUSE including 14 source package names (cosign-3.0.5-1.1, cosign-3.0.5-150400.3.35.1, …), 49 product×package rows across 38 product lines (Image SL-Micro, Image SL-Micro-Azure, … (38 product lines)): Fixed 48, First Fixed 1. | https://www.suse.com/security/cve/CVE-2026-24137/ |
ubuntu
|
medium | CVE-2026-24137 medium priority: Ubuntu including 1 source packages (golang-github-sigstore-sigstore), 4 status rows across 4 suites (jammy, noble, questing, upstream): needs-triage 3, DNE 1. | https://ubuntu.com/security/CVE-2026-24137 |
| 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。 | |||