GHSA-whqx-f9j3-ch6m · 深刻度: medium · エコシステム: go — Cosign verification accepts any valid Rekor entry under certain conditions
Cosign provides code signing and transparency for containers and binaries. Prior to versions 2.6.2 and 3.0.4, Cosign bundle can be crafted to successfully verify an artifact even if the embedded Rekor entry does not reference the artifact's digest, signature or public key. When verifying a Rekor entry, Cosign verifies the Rekor entry signature, and also compares the artifact's digest, the user's public key from either a Fulcio certificate or provided by the user, and the artifact signature to the Rekor entry contents. Without these comparisons, Cosign would accept any response from Rekor as valid. A malicious actor that has compromised a user's identity or signing key could construct a valid Cosign bundle by including any arbitrary Rekor entry, thus preventing the user from being able to audit the signing event. This issue has been patched in versions 2.6.2 and 3.0.4.
総合評価: CVE-2026-22703 は公開エクスプロイトあり(50/100)。CVSS 深刻度は中。悪用される可能性が高い(EPSS 0.08%、0 パーセンタイル) 根拠: 公開エクスプロイトが 1 件参照されています(Exploit-DB)。 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 ↗ |
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 | 0.00% | 0.08% | +0.07% |
| 2 | 2026-01-10 | — | 0.00% | — |
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 |
|---|---|---|---|---|---|---|
| 5.5 | 3.1 | MEDIUM |
|
1.8 | 3.6 | [email protected] |
| 5.5 | 3.1 | MEDIUM |
|
1.8 | 3.6 | [email protected] |
GHSA-whqx-f9j3-ch6m · 深刻度: medium · エコシステム: go — Cosign verification accepts any valid Rekor entry under certain conditions
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2026-22703: 1 source package rows (cosign); 24 state rows across 2 repos (3.23-community, edge-community); fixed 0, open 24. | https://security.alpinelinux.org/vuln/CVE-2026-22703 |
debian
|
not yet assigned | CVE-2026-22703 not yet assigned priority: Debian including 1 source packages (cosign), 3 status rows across 3 suites (forky, sid, trixie): resolved 2, open 1. | https://security-tracker.debian.org/tracker/CVE-2026-22703 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2026-22703 |
suse
|
medium | CVE-2026-22703 severity moderate: SUSE including 13 source package names (cosign-3.0.4-2.1, 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 46, Known Not Affected 2, First Fixed 1. | https://www.suse.com/security/cve/CVE-2026-22703/ |
ubuntu
|
medium | CVE-2026-22703 medium priority: Ubuntu including 1 source packages (cosign), 5 status rows across 5 suites (jammy, noble, plucky, questing, upstream): DNE 2, needs-triage 2, ignored 1. | https://ubuntu.com/security/CVE-2026-22703 |
| URL | タグ |
|---|---|
| https://github.com/sigstore/cosign/commit/6832fba4928c1ad69400235bbc41212de5006176 | Patch |
| https://github.com/sigstore/cosign/pull/4623 | Issue Tracking |
| https://github.com/sigstore/cosign/security/advisories/GHSA-whqx-f9j3-ch6m | Exploit Vendor Advisory |