CVE-2026-44291

描述

## Summary protobufjs used plain objects with inherited prototypes for internal type lookup tables used by generated encode and decode functions. If `Object.prototype` had already been polluted, those lookup tables could resolve attacker-controlled inherited properties as valid protobuf type information. This could cause attacker-controlled strings to be emitted into generated JavaScript code. ## Impact An attacker who can first trigger a prototype pollution vulnerability may be able to influence generated protobufjs encode or decode functions in a way that can lead to arbitrary JavaScript execution. This issue requires a separate prototype pollution primitive before protobufjs is invoked. Applications without a reachable prototype pollution primitive are not directly exploitable through this issue alone. ## Preconditions - The application or one of its dependencies must allow an attacker to pollute `Object.prototype`. - The polluted property must affect protobufjs internal type lookup behavior. - The application must use protobufjs functionality that generates encode or decode code for affected types. - The generated code path must be reached after the prototype pollution has occurred. ## Workarounds Avoid running affected versions in applications where attacker-controlled input can pollute `Object.prototype`. If immediate upgrade is not possible, remove or mitigate reachable prototype pollution primitives and isolate schema/message processing from untrusted application state.

如何修補 CVE-2026-44291

要修補 CVE-2026-44291,請將受影響套件升級到下列已修補版本。

• —升級至 7.5.6 或更新版本

CVE-2026-44291 正在被利用嗎?

低 — EPSS 為 0.5%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• from 0, < 7.5.6

CVSS 分數