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CVE-2026-18536

7.5 · HIGH

Data::Entropy versions before 0.010 for Perl read remote entropy sources over plain HTTP.

Published Aug 1, 2026CWE-319EPSS 0.15%

Overview

CVE-2026-18536 is a high-severity vulnerability. It was published on August 1, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/robrwo/Data-Entropy/security/advisories/GHSA-845w-rcqw-jwvvRefmetacpan.org/release/RRWO/Data-Entropy-0.008/view/lib/Data/Entropy.pm#STATUSRefmetacpan.org/release/RRWO/Data-Entropy-0.010/changesRefsecurity.metacpan.org/docs/guides/random-data-for-security.htmlRefwww.openwall.com/lists/oss-security/2026/08/01/8

How CyberStrike helps

Frequently asked questions

What is CVE-2026-18536?

CVE-2026-18536 is a high-severity vulnerability. It was published on August 1, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-18536?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-18536?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-18536?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-18536 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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