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CVE-2026-18536— Data::Entropy versions before 0.010 for Perl read remote entropy sources over plain HTTP

Quick assessment

Affected
RRWO Data::Entropy
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.

RRWO Data::Entropy是RRWO个人开发者的一款提供熵数据生成与处理的软件模块。 RRWO Data::Entropy 0.010之前版本存在加密问题漏洞，该漏洞源于通过明文HTTP读取远程熵源，且完整性检查可被任意非空字节串匹配，可能导致路径攻击者替换响应并控制rand_bits和rand_int返回的字节。

AI Predicted 7.5 Difficulty: Easy EPSS 0.15% · P4

Possible ATT&CK Techniques 1 AI

T1498 · Network Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
RRWO Data::Entropy < 0.010 affected
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I. Basic Information for CVE-2026-18536

Vulnerability Information
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Vulnerability Title
Data::Entropy versions before 0.010 for Perl read remote entropy sources over plain HTTP
Source: CVE Program / CVE List V5
Vulnerability Description
Data::Entropy versions before 0.010 for Perl read remote entropy sources over plain HTTP. The Data::Entropy::RawSource::RandomOrg and Data::Entropy::RawSource::RandomnumbersInfo remote sources are accessed over plain HTTP. The Data::Entropy::RawSource::RandomOrg integrity check trivially matches any non-empty byte string. Any on-path attacker, such as open WiFi, a compromised ISP, captive portal, or a hostile egress proxy substitutes the response and thereby chooses the bytes returned by rand_bits and rand_int for every application that selected one of these sources via with_entropy_source. The _checkbuf method response is equally attacker-controlled, so the retry/sleep behaviour is steerable too.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
敏感数据的明文传输
Source: CVE Program / CVE List V5
Vulnerability Title
RRWO Data::Entropy 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
RRWO Data::Entropy是RRWO个人开发者的一款提供熵数据生成与处理的软件模块。 RRWO Data::Entropy 0.010之前版本存在加密问题漏洞，该漏洞源于通过明文HTTP读取远程熵源，且完整性检查可被任意非空字节串匹配，可能导致路径攻击者替换响应并控制rand_bits和rand_int返回的字节。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
RRWO Data::Entropy 0 ~ 0.010 -

II. Public POCs for CVE-2026-18536

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III. Intelligence Information for CVE-2026-18536

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Patches & Fixes for CVE-2026-18536 (1)

Vendor Advisories for CVE-2026-18536 (2)

Other References for CVE-2026-18536 (1)

IV. Related Vulnerabilities

Same product: Data::Entropy
Same vendor: RRWO
Same weakness: CWE-319

V. Comments for CVE-2026-18536

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