CVE-2026-34481
HIGHCVSS v3.1: 7.5 · EPSS: 0.0056 (42.4 パーセンタイル)
出典データ取得時点:
概要
- 深刻度
- HIGH
- CVSS
- 7.5 v3.1 · NVD
- EPSS
- 0.0056 (42.4 パーセンタイル) · FIRST.org
- CISA KEV
- 非該当
- 攻撃条件（CVSSベクター）
- ネットワーク権限不要操作不要 · 出典: NVD ベクター
- 影響を受けるベンダー
- apache
- 公開日
- 2026-04-10 · 更新日: 2026-07-11
- 参照情報
- 参照情報へ移動 (6)
CVSS / EPSS / KEV
出典 — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. データと出典
説明
Apache Log4j's JsonTemplateLayout https://logging.apache.org/log4j/2.x/manual/json-template-layout.html , in versions up to and including 2.25.3, produces invalid JSON output when log events contain non-finite floating-point values (NaN, Infinity, or -Infinity), which are prohibited by RFC 8259. This may cause downstream log processing systems to reject or fail to index affected records. An attacker can exploit this issue only if both of the following conditions are met: * The application uses JsonTemplateLayout. * The application logs a MapMessage, or logs an object directly (e.g., via Logger.info(Object), which wraps it in an ObjectMessage), where the message contains an attacker-controlled floating-point value. Users are advised to upgrade to Apache Log4j JSON Template Layout 2.25.4, which corrects this issue. Note: The fix released in version 2.25.4 did not cover all affected code paths. CVE-2026-49844 was assigned to the remaining issue, which concerns the MapMessage.asJson() serialization in Apache Log4j API and is fixed in versions 2.25.5 and 2.26.1.
参照情報
NVDが列挙した参照URLを、リンクのホスト・パターンに対する機械的な一致でグループ化したもの。ラベルはリンクの種別のみを示します。
- 参照 https://github.com/apache/logging-log4j2/pull/4080
- ベンダー勧告 https://lists.apache.org/thread/n34zdv00gbkdbzt2rx9rf5mqz6lhopcv
- ベンダー勧告 https://logging.apache.org/cyclonedx/vdr.xml
- ベンダー勧告 https://logging.apache.org/log4j/2.x/manual/json-template-layout.html
- ベンダー勧告 https://logging.apache.org/security.html#CVE-2026-34481
- 参照 http://www.openwall.com/lists/oss-security/2026/04/10/10