Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Affected versions of squid are subject to a a Use-After-Free bug which can lead to a Denial of Service attack via collapsed forwarding. All versions of Squid from 3.5 up to and including 5.9 configured with "collapsed_forwarding on" are vulnerable. Configurations with "collapsed_forwarding off" or without a "collapsed_forwarding" directive are not vulnerable. This bug is fixed by Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should remove all collapsed_forwarding lines from their squid.conf.
総合評価: CVE-2023-49288 は高リスク（68.8/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 4.78%、91 パーセンタイル） 根拠: EPSS 上、短期間での悪用可能性は高い水準です。 直近 1 日で EPSS が +2.68% 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: 悪用可能性が高いため、影響範囲の確認と修補の優先付けを推奨します。
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 | 2.10% | 4.78% | +2.68% |
| 2 | 2026-01-16 | 2.89% | 2.10% | -0.79% |
| 3 | 2025-12-28 | — | 2.89% | — |
EPSS の全履歴 （全 27 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 |
|---|---|---|---|---|---|---|
| 8.6 | 3.1 | HIGH |
|
3.9 | 4.0 | [email protected] |
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2023-49288: 1 source package rows (squid); 57 state rows across 7 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 5, open 52. | https://security.alpinelinux.org/vuln/CVE-2023-49288 |
debian
|
not yet assigned | CVE-2023-49288 not yet assigned priority: Debian including 1 source packages (squid), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 3, open 2. | https://security-tracker.debian.org/tracker/CVE-2023-49288 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2023-49288 |
suse
|
medium | CVE-2023-49288 severity moderate: SUSE including 5 source package names (squid, squid-6.10-150600.3.6.1, squid-6.12-160000.2.2, squid-6.6-2.1, squid3), 36 product×package rows across 35 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 7.1, … (35 product lines)): Known Not Affected 33, Fixed 3. | https://www.suse.com/security/cve/CVE-2023-49288/ |
ubuntu
|
medium | CVE-2023-49288 medium priority: Ubuntu including 2 source packages (squid, squid3), 24 status rows across 12 suites (bionic, focal, jammy, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 8, ignored 5, not-affected 5, released 3, needed 2, needs-triage 1. | https://ubuntu.com/security/CVE-2023-49288 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| squid-cache | squid | >= 3.5, <= 5.9 | cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:* |