GHSA-frfh-8v73-gjg4 · 深刻度： critical · エコシステム： pip — joserfc has Possible Uncontrolled Resource Consumption Vulnerability Triggered by Logging Arbitrarily Large JWT Token Payloads
joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. In versions from 1.3.3 to before 1.3.5 and from 1.4.0 to before 1.4.2, the ExceededSizeError exception messages are embedded with non-decoded JWT token parts and may cause Python logging to record an arbitrarily large, forged JWT payload. In situations where a misconfigured — or entirely absent — production-grade web server sits in front of a Python web application, an attacker may be able to send arbitrarily large bearer tokens in the HTTP request headers. When this occurs, Python logging or diagnostic tools (e.g., Sentry) may end up processing extremely large log messages containing the full JWT header during the joserfc.jwt.decode() operation. The same behavior also appears when validating claims and signature payload sizes, as the library raises joserfc.errors.ExceededSizeError() with the full payload embedded in the exception message. Since the payload is already fully loaded into memory at this stage, the library cannot prevent or reject it. This issue has been patched in versions 1.3.5 and 1.4.2.
総合評価: CVE-2025-65015 は悪用リスクが高い（60.4/100）。CVSS 深刻度は重大。悪用される可能性が高い（EPSS 0.32%、24 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 | 0.05% | 0.32% | +0.27% |
| 2 | 2026-01-25 | 0.03% | 0.05% | +0.03% |
| 3 | 2025-11-19 | — | 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 |
|---|---|---|---|---|---|---|
| 9.2 | 4.0 | CRITICAL |
|
— | — | [email protected] |
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
GHSA-frfh-8v73-gjg4 · 深刻度： critical · エコシステム： pip — joserfc has Possible Uncontrolled Resource Consumption Vulnerability Triggered by Logging Arbitrarily Large JWT Token Payloads
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2025-65015 unimportant priority: Debian including 1 source packages (joserfc), 3 status rows across 3 suites (forky, sid, trixie): resolved 3. | https://security-tracker.debian.org/tracker/CVE-2025-65015 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2025-65015 |
ubuntu
|
medium | CVE-2025-65015 medium priority: Ubuntu including 1 source packages (joserfc), 5 status rows across 5 suites (jammy, noble, plucky, questing, upstream): DNE 2, needs-triage 2, ignored 1. | https://ubuntu.com/security/CVE-2025-65015 |