Is CVE-2025-40920 in the CISA KEV catalog?

No. CVE-2025-40920 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-40920?

CVE-2025-40920 has a CVSS v3 base score of 8.6 (HIGH).

What is the EPSS score for CVE-2025-40920?

CVE-2025-40920 has an EPSS score of 0.41% (33th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-40920?

Upgrade libcatalyst-authentication-credential-http-perl on debian unstable to 1.018-4 or later.

CVE & CISA-KEV Catalog

CVE-2025-40920

HIGH

8.6

CVSS v3

NVD

Description

Catalyst::Authentication::Credential::HTTP versions 1.018 and earlier for Perl generate nonces using the Perl Data::UUID library. * Data::UUID does not use a strong cryptographic source for generating UUIDs. * Data::UUID returns v3 UUIDs, which are generated from known information and are unsuitable for security, as per RFC 9562. * The nonces should be generated from a strong cryptographic source, as per RFC 7616.

CWE-338 CWE-340

How to fix

Remediation Available

libcatalyst-authentication-credential-http-perlDebian

Fixed in:1.018-4CVE-2025-40920

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityLow

AvailabilityLow

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

Exploit Intelligence

0.41%probability of exploitation in 30 days

33rdpercentile

Low risk: more likely to be exploited than 33% of all known CVEs.

References

Other references7

Related Vulnerabilities

Other CWE-338 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2008-0166	High	7.5	71%	-	Fix
CVE-2009-2367	Critical	9.8	23%	-	-
CVE-2024-29868	Critical	9.1	6.0%	-	-
CVE-2024-31497	Medium	5.9	5.8%	-	Fix
CVE-2021-43799	High	8.6	5.4%	-	Fix
CVE-2008-3280	Medium	5.9	4.0%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-01-17.