CVEvulnerability
CVE-2026-18536
7.5 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-08-01
- Last modified
- 2026-10-23
- Assigner
- 9b29abf9-4ab0-4765-b253-1875cd9b441e
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weaknesses
- CWE-319, CWE-353
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.
Affected configurations
• rrwo data\ \ (< 0.010)
Related
References
- 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