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CVE-2026-113811— Algorithm::UrataniTakeda versions from 0.1.5 before 0.1.7 for Perl allow memory exhaustion via a never-cleared failure shift cache in search

Quick assessment

Affected
CVE-2026-113811
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.

Perl 的 Algorithm::UrataniTakeda 模块在 0.1.5 至 0.1.7（不含 0.1.7）版本中存在内存耗尽漏洞。该漏洞源于搜索过程中失败移位（failure shift）缓存从未被清除。 具体而言，匹配器对象会为每个“前缀树状态与文本字符”的组合缓存失败移位信息，且没有任何机制会清除该缓存。当在某一状态下首次遇到新字符时，系统会添加一条缓存条目，该条目将一直保留至匹配器生命周期结束。 若攻击者能够向长期运行的匹配器提交包含大量不同字符的文本，则每次搜索都会导致内存持续增长，最终引发内存

AI Predicted 5.5 Difficulty: Moderate

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

I. Basic Information for CVE-2026-113811

Vulnerability Information
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Vulnerability Title
Algorithm::UrataniTakeda versions from 0.1.5 before 0.1.7 for Perl allow memory exhaustion via a never-cleared failure shift cache in search
Source: CVE Program / CVE List V5
Vulnerability Description
Algorithm::UrataniTakeda versions from 0.1.5 before 0.1.7 for Perl allow memory exhaustion via a never-cleared failure shift cache in search. The failure shift is cached for each pair of trie state and text character in a field of the matcher object, and nothing clears it. A character not seen before at a given state adds an entry that lasts for the life of the matcher. An attacker who can submit text with many distinct characters to a long-lived matcher can grow its memory with each search.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
- - 0.1.5 ~ 0.1.7 -

II. Public POCs for CVE-2026-113811

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-113811

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Patches & Fixes for CVE-2026-113811 (1)

Vendor Advisories for CVE-2026-113811 (1)

IV. Related Vulnerabilities

Same weakness: CWE-770

V. Comments for CVE-2026-113811

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