GHSA-cmxv-58fp-fm3g · 深刻度： medium · エコシステム： maven — AsyncHttpClient leaks authorization credentials to untrusted domains on cross-origin redirects
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. When redirect following is enabled (followRedirect(true)), versions of AsyncHttpClient prior to 3.0.9 and 2.14.5 forward Authorization and Proxy-Authorization headers along with Realm credentials to arbitrary redirect targets regardless of domain, scheme, or port changes. This leaks credentials on cross-domain redirects and HTTPS-to-HTTP downgrades. Additionally, even when stripAuthorizationOnRedirect is set to true, the Realm object containing plaintext credentials is still propagated to the redirect request, causing credential re-generation for Basic and Digest authentication schemes via NettyRequestFactory. An attacker who controls a redirect target (via open redirect, DNS rebinding, or MITM on HTTP) can capture Bearer tokens, Basic auth credentials, or any other Authorization header value. The fix in versions 3.0.9 and 2.14.5 automatically strips Authorization and Proxy-Authorization headers and clears Realm credentials whenever a redirect crosses origin boundaries (different scheme, host, or port) or downgrades from HTTPS to HTTP. For users unable to upgrade, set `(stripAuthorizationOnRedirect(true))` in the client config and avoid using Realm-based authentication with redirect following enabled. Note that `(stripAuthorizationOnRedirect(true))` alone is insufficient on versions prior to 3.0.9 and 2.14.5 because the Realm bypass still re-generates credentials. Alternatively, disable redirect following (`followRedirect(false)`) and handle redirects manually with origin validation.
総合評価: CVE-2026-40490 は低リスク（35.9/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 0.33%、24 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 | 0.06% | 0.33% | +0.27% |
| 2 | 2026-04-18 | — | 0.06% | — |
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 |
|---|---|---|---|---|---|---|
| 6.8 | 3.1 | MEDIUM |
|
2.2 | 4.0 | [email protected] |
GHSA-cmxv-58fp-fm3g · 深刻度： medium · エコシステム： maven — AsyncHttpClient leaks authorization credentials to untrusted domains on cross-origin redirects
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2026-40490 not yet assigned priority: Debian including 1 source packages (async-http-client), 3 status rows across 3 suites (bookworm, bullseye, sid): open 3. | https://security-tracker.debian.org/tracker/CVE-2026-40490 |
ubuntu
|
medium | CVE-2026-40490 medium priority: Ubuntu including 1 source packages (async-http-client), 9 status rows across 9 suites (bionic, focal, jammy, noble, questing, resolute, trusty, upstream, xenial): needs-triage 9. | https://ubuntu.com/security/CVE-2026-40490 |
| 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。 | |||