CVE-2026-18536 (GCVE-0-2026-18536)

Vulnerability from cvelistv5 – Published: 2026-08-01 10:35 – Updated: 2026-08-03 19:55
VLAI
Title
Data::Entropy versions before 0.010 for Perl read remote entropy sources over plain HTTP
Summary
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 19:55 UTC
CWE
  • CWE-319 - Cleartext Transmission of Sensitive Information
  • CWE-353 - Missing Support for Integrity Check
Assigner
CPANSec CNA
References
Impacted products
Vendor Product Version
RRWO Data::Entropy Affected: 0 , < 0.010 (custom)
Create a notification for this product.
Show details on NVD website
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