Is CVE-2015-8855 in the CISA KEV catalog?

No. CVE-2015-8855 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-8855?

CVE-2015-8855 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2015-8855?

CVE-2015-8855 has an EPSS score of 6.49% (93th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-8855?

Upgrade node-semver on debian 11 to 5.3.0-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2015-8855

HIGHEPSS 93th pctl

7.5

CVSS v3

NVD

Description

The semver package before 4.3.2 for Node.js allows attackers to cause a denial of service (CPU consumption) via a long version string, aka a "regular expression denial of service (ReDoS)."

CWE-399Resource Management Errors

How to fix

Remediation Available

node-semverDebian

Fixed in:5.3.0-1CVE-2015-8855

libjs-semverUbuntu

Fixed in:2.1.0-2ubuntu0.0.1~esm1USN-4776-1

Fixed in:2.1.0-2ubuntu0.1~esm1USN-4776-1

node-semverUbuntu

Fixed in:2.1.0-2ubuntu0.0.1~esm1USN-4776-1

Fixed in:2.1.0-2ubuntu0.1~esm1USN-4776-1

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

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

6.49%probability of exploitation in 30 days

93rdpercentile

High risk: more likely to be exploited than 93% of all known CVEs.

References

Patch1

nodesecurity.io

Third-Party Advisory2

Related Vulnerabilities

Other CWE-399 (Resource Management Errors) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2009-3103	High	10.0	90%	-	-
CVE-2009-0075	High	9.3	85%	-	-
CVE-2005-1790	Low	2.6	83%	-	-
CVE-2010-0806	High	8.8	82%	KEV	-
CVE-2009-2526	High	7.8	82%	-	-
CVE-2015-1868	High	7.8	82%	-	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.