CVE-2025-40905

WWW::OAuth 1.000 and earlier for Perl uses insecure rand() function for cryptographic functions

HIGH
7.3
CVSS Score
Published: February 12, 2026 at 11:39 PM UTC
Updated: June 17, 2026 at 09:22 AM UTC
1 product affected across 1 vendorWWW::OAuth

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Severity
HIGH7.3
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 1.000

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (4)

Third Party Advisory
Source: cverecord
https://perldoc.perl.org/functions/rand
Technical DescriptionThird Party Advisory
Source: cverecord
https://security.metacpan.org/docs/guides/random-data-for-security.html
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.openwall.com/lists/oss-security/2026/02/13/1

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.3HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
LOW
Vector?

Quick Info

StatusANALYZED
CWE
CWE-338

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