Authen::TOTP versions before 0.1.1 for Perl generate secrets using rand

published 2026-05-21 5 mo ago modified 2026-07-23 3 mo ago also EUVD-2026-31332

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits: 0; none known

Authen::TOTP versions before 0.1.1 for Perl generate secrets using rand.

Secrets were generated using Perl's built-in rand function, which is predictable and unsuitable for security usage.

Patch / fix

fixed in 1 links 1

TCHATZI Authen::TOTP 0.1.1

github.com/tchatzi/Authen-TOTP@d04f30c commit

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 5 mo ago (2026-05-21)

Exploit prediction

0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

TCHATZI Authen::TOTP

Classification

Weakness

CWE-331 Insufficient Entropy

References

Sources

CVE List CVE-2026-46473
NVD CVE-2026-46473

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary