CVE-2026-18536

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/robrwo/Data-Entropy/security/advisories/GHSA-845w-rcqw-jwvv	Vendor Advisory
https://metacpan.org/release/RRWO/Data-Entropy-0.008/view/lib/Data/Entropy.pm#STATUS	Release Notes
https://metacpan.org/release/RRWO/Data-Entropy-0.010/changes	Release Notes
https://security.metacpan.org/docs/guides/random-data-for-security.html	Third Party Advisory
http://www.openwall.com/lists/oss-security/2026/08/01/8	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:rrwo:data\:\:entropy:*:*:*:*:*:perl:*:*

History

No history.

Information

Published : 2026-08-01 11:16

Updated : 2026-08-07 18:52

NVD link : CVE-2026-18536

Mitre link : CVE-2026-18536

CVE.ORG link : CVE-2026-18536

JSON object : View

Products Affected

rrwo

data\

CWE

CWE-319

Cleartext Transmission of Sensitive Information

CWE-353

Missing Support for Integrity Check

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