Home/CVE/WWW::OAuth 1.000 and earlier for Perl uses the rand() function as the default source of entropy, which is not cryptograp
CVE

CVE-2025-40905

WWW::OAuth 1.000 and earlier for Perl uses the rand() function as the default source of entropy, which is not cryptograp

WWW::OAuth 1.000 and earlier for Perl uses the rand() function as the default source of entropy, which is not cryptographically secure, for cryptographic functions.

HIGH · CVSS 7.3 EPSS 0.0006
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-338Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
▤

Affected Products & Versions

1
dbook www\<= 1.000
▣

Scoring & Timeline

7.3
HIGH · CVSS v3.1 · 9b29abf9-4ab0-4765-b253-1875cd9b441e
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD13 Feb 2026 · 12:16 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://metacpan.org/release/DBOOK/WWW-OAuth-1.000/source/lib/WWW/OAuth.pm#L86Issue TrackingProduct
https://perldoc.perl.org/functions/randThird Party Advisory
https://security.metacpan.org/docs/guides/random-data-for-security.htmlThird Party Advisory
http://www.openwall.com/lists/oss-security/2026/02/13/1Mailing ListThird Party Advisory
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