CVE-2026-18536: RRWO Data::Entropy · Cleartext Transmission
Affects RRWO Data::EntropySource CVE Database V5
Not known to be exploited · CVSS 7.5 High : upgrade to 0.010 soon.
Data as of 30 Oct 2026, 20:25 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 0.010
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 1 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Upgrade Data::Entropy and Data-Entropy to 0.010.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| RRWOData::Entropy | Affected
| Fixed in
|
GitHubData-Entropypkg:github/Data-EntropyOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A patch is available for Data::Entropy to address this issue. Since this is a cloud service, the vendor manages remediation server-side. Users should upgrade to version 0.010 or later to ensure entropy sources are accessed securely. Check the vendor advisory for confirmation of patch deployment and further guidance.
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.
References
- github.com/robrwo/Data-Entropy/security/advisories/GHSA-845w-rcqw-jwvv (opens in a new tab)
- metacpan.org/release/RRWO/Data-Entropy-0.010/changes (opens in a new tab)
- metacpan.org/release/RRWO/Data-Entropy-0.008/view/lib/Data/Entropy.pm (opens in a new tab)
- security.metacpan.org/docs/guides/random-data-for-security.html (opens in a new tab)
- openwall.com/lists/oss-security/2026/08/01/8 (opens in a new tab)