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CVE-2016-2515

20
FAUCET Score

CVE-2016-2515 describes a denial-of-service vulnerability affecting Hawk versions before 3.1.3 and 4.x before 4.1.1. Remote attackers can exploit this by sending a long header or URI, which triggers an inefficient regular expression match, leading to high CPU consumption or a partial outage. This vulnerability has a CVSS score of 7.5 (High), indicating a network-based attack with low complexity and high impact on availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
3.1.2CPE matchmatch criteria
cpe:2.3:a:hawk_project:hawk:3.1.2:*:*:*:*:*:*:*
4.1.0CPE matchmatch criteria
cpe:2.3:a:hawk_project:hawk:4.1.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.37%
Probability of exploitation in next 30 days
EPSS Percentile
87.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0337 is in the 78th percentile among its peer group of 51,485 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: hawkFixed in: 3.1.3
npmpatch availablevia ghsa
Product: hawkFixed in: 4.1.1
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Enterprise 3.1Fixed in: nodejs-hawk
redhatvendor investigatingvia redhat_api
Product: Red Hat Software CollectionsFixed in: nodejs010-nodejs-hawk
redhatvendor investigatingvia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise LinuxFixed in: rh-nodejs4-nodejs-hawk

Vendor Advisories (2)

npmGHSA-jcpv-g9rr-qxrchigh

Regular Expression Denial of Service in hawk

Jul 31, 2018
redhatCVE-2016-2515Low

nodejs-hawk: Long headers or URIs can cause minor DoS

Jan 19, 2016

References

bugzilla.redhat.com / show_bug.cgi
github.com / hueniverse/hawk/commit/0833f99ba64558525995a7e21d4093da1f3e15fa
Patch
github.com / hueniverse/hawk/issues/168
Patch
nodesecurity.io / advisories/77
openwall.com / lists/oss-security/2016/02/20/1
openwall.com / lists/oss-security/2016/02/20/2