GHSA-22p3-qrh9-cx32 · 深刻度： high · エコシステム： pip — URL previews of unusual or maliciously-crafted pages can crash Synapse media repositories or Synapse monoliths
Synapse is an open source home server implementation for the Matrix chat network. In versions prior to 1.61.1 URL previews of some web pages can exhaust the available stack space for the Synapse process due to unbounded recursion. This is sometimes recoverable and leads to an error for the request causing the problem, but in other cases the Synapse process may crash altogether. It is possible to exploit this maliciously, either by malicious users on the homeserver, or by remote users sending URLs that a local user's client may automatically request a URL preview for. Remote users are not able to exploit this directly, because the URL preview endpoint is authenticated. Deployments with `url_preview_enabled: false` set in configuration are not affected. Deployments with `url_preview_enabled: true` set in configuration **are** affected. Deployments with no configuration value set for `url_preview_enabled` are not affected, because the default is `false`. Administrators of homeservers with URL previews enabled are advised to upgrade to v1.61.1 or higher. Users unable to upgrade should set `url_preview_enabled` to false.
総合評価: CVE-2022-31052 は中リスク（51.6/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 1.58%、72 パーセンタイル） 推奨対応: 影響資産を整理し、修補計画に組み込んでください。
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 | 2026-06-25 | 1.35% | 1.58% | +0.22% |
| 2 | 2026-06-15 | 0.38% | 1.35% | +0.98% |
| 3 | 2026-05-28 | — | 0.38% | — |
EPSS の全履歴 （全 16 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 |
|---|---|---|---|---|---|---|
| 6.5 | 3.1 | MEDIUM |
|
2.8 | 3.6 | [email protected] |
| 6.5 | 3.1 | MEDIUM |
|
2.8 | 3.6 | [email protected] |
| 3.5 | 2.0 | LOW |
|
6.8 | 2.9 | [email protected] |
GHSA-22p3-qrh9-cx32 · 深刻度： high · エコシステム： pip — URL previews of unusual or maliciously-crafted pages can crash Synapse media repositories or Synapse monoliths
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
medium | CVE-2022-31052: 1 source package rows (synapse); 21 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 7, open 14. | https://security.alpinelinux.org/vuln/CVE-2022-31052 |
debian
|
not yet assigned | CVE-2022-31052 not yet assigned priority: Debian including 1 source packages (matrix-synapse), 2 status rows across 2 suites (forky, sid): resolved 2. | https://security-tracker.debian.org/tracker/CVE-2022-31052 |
ubuntu
|
medium | CVE-2022-31052 medium priority: Ubuntu including 1 source packages (matrix-synapse), 12 status rows across 12 suites (bionic, focal, impish, jammy, kinetic, lunar, mantic, noble, oracular, trusty, upstream, xenial): not-affected 5, needs-triage 3, DNE 2, ignored 1, released 1. | https://ubuntu.com/security/CVE-2022-31052 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| matrix | synapse | < 1.61.1 | cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:* |
| fedoraproject | fedora | 35 | cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* |
| fedoraproject | fedora | 36 | cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* |