Is CVE-2015-8559 in the CISA KEV catalog?

No. CVE-2015-8559 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-8559?

CVE-2015-8559 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2015-8559?

CVE-2015-8559 has an EPSS score of 1.93% (78th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-8559?

Upgrade chef to 15.4.45 or later.

CVE & CISA-KEV Catalog

CVE-2015-8559

HIGHEPSS 78th pctl

7.5

CVSS v3

NVD

Description

The knife bootstrap command in chef Infra client before version 15.4.45 leaks the validator.pem private RSA key to /var/log/messages.

CWE-200Information Exposure

How to fix

Remediation Available

chefNVD

Affected:< 15.4.45Fixed in:15.4.45CVE-2015-8559derived from NVD

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

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

1.93%probability of exploitation in 30 days

78thpercentile

Elevated risk: more likely to be exploited than 78% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory1

openwall.com

Other references2

Related Vulnerabilities

Other CWE-200 (Information Exposure) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-24919	High	8.6	100%	KEV + Ransom	-
CVE-2020-14181	Medium	5.3	100%	-	Fix
CVE-2021-34429	Medium	5.3	99%	-	Fix
CVE-2018-11409	Medium	5.3	98%	-	-
CVE-2021-41277	Critical	10.0	97%	KEV	-
CVE-2016-2183	High	7.5	96%	-	Fix

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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 2026-05-13.