CVE-2026-18536 Affecting libdata-entropy-perl package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published2 Aug 2026
- disclosed1 Aug 2026
Introduced: 1 Aug 2026
NewCVE-2026-18536 (opens in a new tab)How to fix?
There is no fixed version for Echo:latest libdata-entropy-perl.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libdata-entropy-perl package and not the libdata-entropy-perl package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
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.
References
- https://advisory.echohq.com/cve/CVE-2026-18536
- https://github.com/robrwo/Data-Entropy/security/advisories/GHSA-845w-rcqw-jwvv
- https://metacpan.org/release/RRWO/Data-Entropy-0.008/view/lib/Data/Entropy.pm#STATUS
- https://metacpan.org/release/RRWO/Data-Entropy-0.010/changes
- https://security.metacpan.org/docs/guides/random-data-for-security.html
- http://www.openwall.com/lists/oss-security/2026/08/01/8