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CVE-2026-68499— re2: Global `String.prototype.match` with an empty-matchable pattern never advances → infinite loop with unbounded native memory growth (DoS)

Quick assessment

Affected
uhop node-re2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

re2 为 Google 的 RE2 正则表达式引擎提供了 Node.js 绑定。在版本 1.25.2 之前，当使用能够匹配空字符串的全局 RE2 模式调用 String.prototype.match 时，其底层实现（位于 lib/match.cc）未能正确推进原生匹配器（native matching cursor）的位置，从而导致无限循环、无界原生内存增长，阻塞事件循环，并可能耗尽主机内存。该问题已在版本 1.25.2 中修复。

CVSS 6.2 · Medium EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
uhop node-re2 < 1.25.2 affected
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I. Basic Information for CVE-2026-68499

Vulnerability Information
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Vulnerability Title
re2: Global `String.prototype.match` with an empty-matchable pattern never advances → infinite loop with unbounded native memory growth (DoS)
Source: CVE Program / CVE List V5
Vulnerability Description
re2 provides Node.js bindings for Google's RE2 regular expression engine. Prior to 1.25.2, re2's String.prototype.match implementation with a global RE2 pattern that can match the empty string fails to advance its native matching cursor in lib/match.cc, causing an infinite loop and unbounded native memory growth that blocks the event loop and can exhaust host memory. This issue is fixed in 1.25.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不可达退出条件的循环(无限循环)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
uhop node-re2 < 1.25.2 -

II. Public POCs for CVE-2026-68499

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III. Intelligence Information for CVE-2026-68499

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Patches & Fixes for CVE-2026-68499 (1)

Vendor Advisories for CVE-2026-68499 (1)

Vendor Pages for CVE-2026-68499 (1)

IV. Related Vulnerabilities

Same product: node-re2
Same vendor: uhop
Same weakness: CWE-835

V. Comments for CVE-2026-68499

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