CVE-2026-18536
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
4v0.009, v0.008, v0.007+ 1 more
- (no CPE)range: v0.009, v0.008, v0.007
- (no CPE)range: <0.010
- Range: <0.010
Patches
Vulnerability mechanics
References
5- www.openwall.com/lists/oss-security/2026/08/01/8nvdMailing ListThird Party Advisory
- github.com/robrwo/Data-Entropy/security/advisories/GHSA-845w-rcqw-jwvvnvdVendor Advisory
- security.metacpan.org/docs/guides/random-data-for-security.htmlnvdThird Party Advisory
- metacpan.org/release/RRWO/Data-Entropy-0.008/view/lib/Data/Entropy.pmnvdRelease Notes
- metacpan.org/release/RRWO/Data-Entropy-0.010/changesnvdRelease Notes
News mentions
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