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CVE-2026-107373— ExtUtils::Typemaps::STL::String versions before 1.06 for Perl T_STD_STRING typemap may read the SV length before stringifying the argument

Quick assessment

Affected
CVE-2026-107373
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 模块中，版本号低于 1.06 的 typemap 存在一个潜在的安全问题。该 typemap 在将参数转换为字符串之前，可能会先读取 SV（Scalar Value，Perl 标量值）的长度。 具体而言，该 typemap 使用了如下代码： 然而，C++ 中参数的求值顺序并未明确规定，某些编译器可能会优先生成先执行 的代码。 当 不是字符串类型（例如整数、数字或引用）时， 会返回一个无效值，从而导致程序中止或发生段错误（segfault）。

AI Predicted 5.5 Difficulty: Theoretical

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 1

VendorProduct Version RangeStatus
None None < 1.06 affected

I. Basic Information for CVE-2026-107373

Vulnerability Information
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Vulnerability Title
ExtUtils::Typemaps::STL::String versions before 1.06 for Perl T_STD_STRING typemap may read the SV length before stringifying the argument
Source: CVE Program / CVE List V5
Vulnerability Description
ExtUtils::Typemaps::STL::String versions before 1.06 for Perl T_STD_STRING typemap may read the SV length before stringifying the argument. The typemap uses $var = std::string( SvPV_nolen($arg), SvCUR($arg) ) However, evaluation order for C++ arguments is not specified, and some compilers may produce code that evalutes SvCUR($arg) first. When $arg is not a string (for example, an interger, number or a reference) then SvCUR will return an invalid value, and the program may abort or segfault.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
- - 0 ~ 1.06 -

II. Public POCs for CVE-2026-107373

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III. Intelligence Information for CVE-2026-107373

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Patches & Fixes for CVE-2026-107373 (1)

Vendor Pages for CVE-2026-107373 (1)

Other References for CVE-2026-107373 (2)

IV. Related Vulnerabilities

Same weakness: CWE-125

V. Comments for CVE-2026-107373

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