A flaw was found in the libsoup HTTP library that can cause proxy authentication credentials to be sent to unintended destinations. When handling HTTP redirects, libsoup removes the Authorization header but does not remove the Proxy-Authorization header if the request is redirected to a different host. As a result, sensitive proxy credentials may be leaked to third-party servers. Applications using libsoup for HTTP communication may unintentionally expose proxy authentication data.
総合評価: CVE-2026-1539 は低リスク(28.4/100)。CVSS 深刻度は中。悪用される可能性が高い(EPSS 0.24%、14 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 | 0.07% | 0.24% | +0.17% |
| 2 | 2026-03-20 | 0.03% | 0.07% | +0.04% |
| 3 | 2026-01-29 | — | 0.03% | — |
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 |
|---|---|---|---|---|---|---|
| 5.8 | 3.1 | MEDIUM |
|
3.9 | 1.4 | [email protected] |
| 5.8 | 3.1 | MEDIUM |
|
3.9 | 1.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2026-1539 not yet assigned priority: Debian including 2 source packages (libsoup2.4, libsoup3), 7 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 5, resolved 2. | https://security-tracker.debian.org/tracker/CVE-2026-1539 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2026-1539 |
suse
|
medium | CVE-2026-1539 severity moderate: SUSE including 49 source package names (libsoup-2_4-1-2.62.2-5.37.1, libsoup-2_4-1-2.68.4-150200.4.33.1, …), 196 product×package rows across 40 product lines (Image SLE-Micro, Image SLE-Micro-Azure, … (40 product lines)): Fixed 192, First Fixed 4. | https://www.suse.com/security/cve/CVE-2026-1539/ |
ubuntu
|
medium | CVE-2026-1539 medium priority: Ubuntu including 2 source packages (libsoup2.4, libsoup3), 11 status rows across 7 suites (bionic, focal, jammy, noble, questing, upstream, xenial): needed 6, released 5. | https://ubuntu.com/security/CVE-2026-1539 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| gnome | libsoup | — | cpe:2.3:a:gnome:libsoup:-:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 6.0 | cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 7.0 | cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 8.0 | cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 9.0 | cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 10.0 | cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-1539 | Third Party Advisory |
| https://gitlab.gnome.org/GNOME/libsoup/-/issues/489 | Issue Tracking Vendor Advisory |